Well, my first impression:
- general look is nice (so good job here)
- latest posts section contains whole names of topics, instead of cutting them and appending ...
(I consider this as a step back)
- rounded avatars - not so happy with it, since it cut part of my avatar off
- BB code improvements - here I say finally, when having an option to create a table directly from the bar, instead of typing whole code myself (also appreciate additions like TH for rows, but not so much default_value=full for table width); HEX color option is also nice addition
- very bad color when text marking, almost the same as background (in post create window)
Generally I like the new style, even though now I need a lot of time to get used to that (as well as I needed back in 2017, after previous change).