"I didn't like the UI changes because I have to spend some time relearning the UX flow." would have been quicker. Disliking scrolling is super funny.
Admittedly I do have worries, but I think I'll hold off on doom saying for another 2 weeks, myself.
This is utter nonsense. The issue is not Relearning the UI. Is the UI being worse, period.
In the current UI you can see the same amount of information (sometimes more, depending on which window we are talking about) without having to navigate to other tabs, nor having to scroll a lot etc.
What is funny is that you say that it is a matter of learning the UI, when it literally has nothing to do with it. You like scrolling? Nice, most people here want to play Stellaris instead, if we wanted to scroll we would watch our facebook feeds or similar.
The current window for Modification Template shows the exact same info, but in a much more amicable and navigable window, which by the way are two prime design aspects to take into account when doing UI design.
And the planetary one literally forces you to click on one button every single time you Tab over your planets just to know what is going on there. How is that relearning? i already learnt I need to click the button, as I am clearly mentioning it. So no, that is not the issue.
In fact, I am utterly convinced you have not even tried the beta because what you say I so extremely wrong and out of reality that that is the only explanation. Instead of asking others to relearn the UI go check for yourself how awful it is compared to what we have now, then you might actually know what you are talking about.
EDIT: Not to mention, that it is not doom saying, it is giving feedback so that things that are wrong dont go live as they are. But sure, go and wait 2 weeks without actually trying the beta, and then complain after release about the things that should have been mentioned in the beta so that they get fixed. That kind of attitude is what makes possible for several issues to reach production. If more people took the time to actually test the betas and provide actual feedback (instead of accusing others of not wanting to learn the new UI, when it is obvious that the one that didn't even check the stuff is you) then we would (probably) have better releases.