Allow custom fields in SharePoint calendar available to view and update from Outlook

Could we please have the ability to create Wikis in SharePoint that look like TechNet or Wikipedia? Please try to make things more simple. Do not over complicate it again.

Provide ability for user to clear frequent sites and activity on their SharePoint page.

You cannot copy a site page from on site to the site pages folder of another site. This is crazy. You can't restructure your pages into other sites. This prevents users from investing any effort in configuration that might change. It is extremely limiting.

There is a strong need to Group By more than two levels of column data. Example, we use SP to track mosquitos for vector control. I want to Group by Week, Trap Site, Trap Type, Species, Condition, etc... The ability to drill down and see totals for each condition or "Group By" would be fantastic. This leads to the next suggestion, Add Calculated columns to Group By Totals.

Please allow site administrators to remove or hide this button as we don't want our internal user to send feedback to microsoft instead of internal support team.

Wikipedia had it implemented years ago. I suggest you to add a dynamically created Table of Contents (TOC) for SharePoint Wiki pages, according to the title-styles used in the documents.

There is currently a 255 character restriction on Hyperlink fields. This restriction impedes ability to save Urls that might include hash values are long query strings. Some examples where this is really common are links to SSRS reports (with parameters) and Search urls that contain refinements.

Allow the owners of the sites to view a report of the security of their site. Start by adding a chart of the inheritance breaks of the whole site in one glance. This will become more and more important since you can use the 'Share' button on a file and break inheritance without understanding what you're doing.

Bring back 'export to excel' to the new document library experience

It would be great to tag News posts/articles by category (e.g., training, motivational, announcement, etc.). Users could then refine by category to see all articles under that tag.

SharePoint should support Field-Level permissions. It is very common to need the ability to show/hide field values depending on current user permissions

Add the ability to mass update Content Type using Datasheet view and NOT change the modified date.

Add the "Rating Settings" to document libraries in Communication Sites. This exists on other doc libraries from other site templates. This would allow users to rate/like content and we could add a section of "most like documents" etc to the page.

include thumbnail of image in events widget card view

Blog pages/posts should allow 'Hashtags and @mentions but they currently dont.

The rest of SharePoint social (micro blogging converstations, forum comments etc) make use of this. so it is beyond strange that if you comment on a blog you cant mention someone to make them aware etc