Hey @avr!
Coloring is being considered, the dev team is particularly interested if there are any other features they could include that would fit the same use cases in an attempt to prioritize features that enable more accessible design patterns. So, the more information they can hear about your use case the better! Especially, if you've considered other patterns, which of those might not be available in Retool, and why you're choosing color-coding in particular.
Also, thanks for surfacing the issue of having edits made through a separate component persist without being saved @yiga2. It's something that has come up a number of times before (one recent example) and the workarounds can be a bit tricky. Admittedly, though I've seen people ask for it, I'm not super familiar with all of the reasons why they are 
would you mind sharing a bit more about how it's useful for you?
For the issue with multi-select, the new table has unique properties for the collection of rows that have been selected as well as the most recently selected row. They are, respectively, selectedRows/selectedSourceRows (purple) and selectedRow/selectedSourceRow (orange):
Also, single-click to edit cells should be possible as long as single-cell selection is turned off.
