Well, I join in asking for a less obscured UI in general. In comparison to Horizons you'd have to forward way more clicks, than before. The most prominent example, for me personally, is how the shipyard is working now. You're forced to constantly move back and forth through pretty much any of the shipyard UI instances, if you're interested in detail or comparison info. I gave up at one point, and just did it on pen and paper, or refering to 3rd party tools, which unfortunately in some cases, are broken as well. But that's not Frontiers responsibility I guess.
This impression should be specially siginificant, because I played Horizons for only a week or so.
Also, average fps in Horizons in space 140-200(RTX 3070), now is 80-140. Performance in stations significantly dropped as well, ranging anywhere from 60-90 fps, where it was stable 140 most of the time before. However, it's worth mentioning, that this does not affect gameplay at all, because my eyes do not really notice the difference between 80 and 140fps. They prolly would if perf. is dropping below 40-50 fps.
One thing I do however notice, is rendering lag during intial build up, when you enter a new room, or change location from inside your ship, to disembark etc. This is also not game breaking, but it is a significant, and noticeable difference to Horizons in rendering performance.