Absolutely horrendous implementation of a great idea.
I'm really sad to see that nearly every non-bug complaint that I read about in the beta feedback was totally ignored, and just pushed to us anyways.
Too bright (just like the retchid color of the forums, but at least on the forums I can, and do, use a recolor extension).
No way to add fp to research directly from inventory. You still have to add fp manually to your bar, go to research, use, go back to inventory, rinse, repeat. This is a feature that has been requested for a long time, and now is when it logically should have been implemented. The only reason I can think of to have it this way is to trick new players into spending diamonds without realizing that they don't need to.
Costs are not listed directly, but as a XXXXXXX/XXX listing. This is an annoying design decision in my opinion, but is livable.
Too small of text. Hard to read, and is compounded by the oversize issue.
I do like that on PC you can just hover over the tech and the research paths light up, instead of having to click the tech to see them.
EDIT - just got the update on mobile, and the oversized issue isn't there on my phone (don't have my tablet handy to check there), which is good. But even with glasses it is hard to read the details on my phone. The text (other than the main labels) is smaller than it needs to be with terrible contrast.
If the background had gotten some kind of image to break up the solid color, I think it would be more tolerable. Thankfully I don't spend much time on that screen.
As much as I like the collapsing ages and artwork, I wish I could go back. With a few changes this could have been one of the best updates to the game, but as it stands it is not.