The publishing possibilities shown in the new communication sites serve a great insight of possibilities to create content in SharePoint. While this is an suitable approach for user generated content such as in Wikis there is a high demand to provide a consistent corporate wide communication.
In the past this was possible through page layout option which is now missing and removes the ability for corporate communication departments to manage, plan and organise the content to communicate.
In addition the missing page layout option lead to inconsistent and at least time consuming page creation. It will be hard to recreate the same page again because all asset types and content elements needs to be placed in the exact same order on the new page.From previous project mostly two to three page layout where enough to provide an efficient way to create and orchestrate content creation with enough flexibility. The current page variant selection is not an appropriate equivalent.

The current communication site template cannot be used for corporate wide communication because there are some important things missing.
The overall design is only able to speak and represent only the Microsofot CI/CD. The missing branding and theming options makes it hard to be used in corporates because there is currently no way to apply corporate communication and design guidelines to the page. For user it makes it hard to identify the page as an official communication channel by the company and not by Microsoft.

In addition not even well known and supported customisations through Themes is possible at the moment to change the look and feel. Changes in themes does not reflect in the communication site at all.

Overall it is hard to sell the communication site to marketing and CEO from a customer prespective. Right now the only valid option to establish communication channels at customers is through the classical publishing features (with not such a fancy page creation) or through classical blogs.

The flexibility of page creation mostly will overwelm business users and is definitly not markting and communications departments like to have. There goal is to provide fast and effiecent information. Right not the community portal lacks of two things:
1) Consistency - Any user can create any layout and it will be hard, time consuming and inefficient to create a consitent layout
2) Missing metadata for further filtering and content categorisation
3) No branding options to speak the tone and voice of the companyThis is the most challenging piece of inconsitent communication because it doesn't allow to speak the voice and tone of the customer it is only a well crafted application in Office 365.
Because of the last bullet point here customer already search for alternative intranets and communication medias to represent the corporate CI/CD Guidelines and go back to tools such as Wordpress. This is the most worring part because SharePoint in the past was always a good intranet content management system. Improvable but working.The first step to fix these issues will be to have custom page templates that allows to create new content structured fast and efficient with fixed content block. Metadata to categorize content and avoid to have multiple comminucations sites that user need to look up.
Finally branding made SharePoint huge and was always a great selling point to marketing, beside the collaboration aspect, ECM and other aspects. Right now it feels like writing a corporate word document and be only allowed to use the default template with only the ability to add a custom logo.

To allow a little more customization to the look & feel, I suggest a very simple web part that would allow you to do a full width divider section where the user could pick the background color and the height. The web part would then go edge to edge in the column it is placed in and allow for the user to design visual breaks between sections. A nice to have would be the ability to add some styled text (font, size, color) aligned to the left, middle, or right side of the divider.

For the idea to really add a lot of design value, the web part would need to be allowed in the Full-Width Column section layout (right now only images and hero web parts are allowed there).

For security protection, I am considering to restrict the creation of the Communication site by general users. However, I have received the guidance from the support desk that the Office 365 group will also be the same setting when controlling the creation of the Communication site in conjunction with each other by default behaivor.

Therefore, I hope the feature will be improved to allow general users to create Office 365 groups only, therefore, it would be useful if the feature will be allowed separately controlling the creation settings between the Communication site and Office 365 as well. Thank you for your support.

In Communication sites as well as in modern pages scrolling via the keyboard (page up / down or arrow keys) does not work upon initial load of the page using Chrome.

Scrolling only works if the content area is clicked / selected.

In Communication Sites I cannot click the content area, because it is full of hero images and I would be redirected so I have to click the scrollbar with the mouse, then I can use the arrow keys to scroll.
In a regular modern page I have to click somewhere in the content area and I am able to use the keyboard for scrolling.

Scrolling (especially in the vertically long Communication Sites) should work right away using the keyboard.