I am making observations and suggestions, not complaints. That's what beta software is for, and the only reason why these threads here exist.
Also, if you look around in the forum, you will find that the users are quite split in to equal halves regarding the battery icon. One half likes the old one better, one half the new one. I belong to the second half, and - in addition - would prefer to have the original one from the Chinese ROM (which happens to be the "new" one).
If it was easy to replace the icon, I would not say anything and just do it (just as I repair the splashscreen and boot animation every time after installing a new ROM on my Mi 9Tpro). Now YOU tell me how to do it , and all is good