Imperialism seems good now. It's right side is far stronger than the left, but similar stuff can be observed with almost all trees with choices anyway. Rationalism got too heavy a buff while it needed the opposite I'd say. Industry seems a bit more situational now and I'd at least improve it's +2C +2S per custom house/stock/bank policy which really is underwhelming. Maybe by adding something like +2G, maybe by including Stone Works/Stables for the yields which'd make sense as Industry improves Pastures and Quarries.
Now the biggest policy balance problems imho are Statecraft being underwhelming and ideologies containing lots of awful policies, the second I already wrote about in relevant threads some time ago. I mean some of those tenets are ancient era-tier. Autarky seems like it'd fit right in with Progress if the internal trade route gold was slightly reduced, same with that weird total war policy which is a slightly modified mix of parts of two progress policies, except it comes way too late for the percentages to have an impact. All three have such strange examples but those I can list off the top of my head. It's definitely hurtful to the AI as I can just avoid such "great" policies and open any of the two late trees I didn't finish yet, but I doubt it's hard-coded to know that opening any of the renaissance trees is highly favourable to wasting SoPols on some tenets.