May I ask what you are concerned about;
Is it that your existing char is now under-powered compared to other players?
Or that you won’t enjoy the game without some OP skills?
Levelling is so fast at the moment that it’s easy to rebuild to whatever the current meta is, if you don’t want to do that there’s the reset DLC. Free class / skill resets have been given away frequently this year but you’ll need to watch the news / events for them.
I wouldn’t understand if you were concerned that you won’t enjoy the core PvE content after nerfs. I think games are boring when there’s no challenge. And personally, I think the game is far too easy right now.
I think a better thing to consider is what sort of things do you would find fun in the game, and whether potentially having weaker skills matter.