Comment bubbles only "float" over the fixed worksheet area that's set by default or that's manually changed by the user. They also will float over hidden adjacent rows or columns. However, if a comment is in a cell that's fixed using the "freeze panes" feature but the worksheet display isn't contiguous to the comment bubble, the bubble will be cut off instead of float over the frozen panes.

This makes it impossible to read a comment saved in a row 1 header field (say to read details of what type of data is supposed to go there) but the cell you want to edit is in row 1000.

Can comments be improved to float over all user interface and worksheet elements so they can display without interruption regardless of the freeze panes settings?

I'm sure that Microsoft's experts will be able to optimize the Power Query code. However, almost certainly there will be users with very massive models that update very long. Please add the possibility of using distributed computing to process Power query queries.
It would be very cool if we will be able to configure in a simple interface wich of colleagues computers in the local network (and maybe on the Internet), whose resources, can be used to speed up the calculation. And when processing queries, use avialable resources together.
In addition, the use of distributed computing in a local network can increase the performance of individual computers.
If you can create a simple user interface and the ability to configure without the intervention of system administrators (or with minimal intervention), this will become a useful option.

Autosave is fine for a phone but using in in the "real" (Desktop - paid for) version of Excel is a terrible idea.

I have my main files on a portable running Win 10 Desktop and I save first to a local drive expecting them then to be updated in my OneDrive.

This hasn't happened. My iPad copies are the versions since before the misguided upgrade to the Desktop version that made AutoSave compulsary. Files are not then saved on the portable but marked Update Pending which is useless when later in the day I want to check - for instance - my share situation on the iPad before making an investment decision.

Issue:
There are many times where my co-workers and I are required to work in the same spreadsheet simultaneously. The excel web application allows us to do this but does not contain the full functionality of excel that is required to do our work. Although Excel already has as shared spreadsheet option, each time a user wants to see updates, they have to save and hope the other person saved their updates as well.

Solution:
It would be great to use excel and collaborate in real time just as the web app does but within the excel platform on our computers with all the regular features we use such as macros, VBA, formatting and etc. This would greatly enhance productivity and our use with excel to be able to edit spreadsheets in real time with others with less limitations as the web app or the current excel sharing setup.

let users paste a table from Word / Outlook to excel without introducing new rows... (just ignore the line breaks so that multiple lines of text from a cell in WORD is still just one cell in EXCEL.

these tables in word or outlook are probably pasted from Excel to word/outlook in the first place :)

copying tables back should be the same... or maybe a PASTE SPECIAL option "paste from table"...

Without this feature, your users have been for the past decade using workarounds like:
* paste in to google sheets and moving that file back...
* replace newline in word with special characters like a pilcrow, and then replace it back to a new line in Excel (Ctrl+J / alt+010) after pasting...
* ... (macros and other tools)