As somebody who started with the PS5 launch I wanted to mention that with this latest patch I finally feel like I'm more or less "caught up" to most launch players in terms of progress on resources, relics, traces, and characters. This is a single player game so it's not like I was actually "behind", but I was able to clear all of the latest endgame modes with full stars starting with this patch.
I have purchased the battle pass many times, so that obviously was a huge resource boost, but most of the characters I want and regularly use have solid to excellent relics and maxed out traces, and I no longer really have any major resource deficits that I need to spend multiple days in a row farming calyxes or the like.
Here are my characters, though it's worth noting I don't use Yanqing or Bailu, and Gallagher, Hanya, and Serval are my current "side projects" that aren't built. Also I have at least E0 for every released 4*, just didn't want to stitch the image:
I have Topaz S1 and Firefly S1, though the only reason I have Firefly E2 S1 is because I luckily got a double pull when going for her initially, so I figured I might as well go deep with nothing else super exciting on the horizon.
I'm planning to get Feixiao since I already have the FUA team if you can't tell lol, it's very fun.
I'm thinking I may also pull Lingsha, because she may enable me to run two FUA teams in MOC/AS, but that will probably depend on what characters are revealed for the next patch after.
If there is a character I regret pulling, funnily enough it would be Acheron. I feel like I don't really have the supports to make her shine, though she has been doing better since swapping Guinaifen for Pela. 90% of the reason I pulled her was for her overworld technique, and that has been crazy worth it, so I don't actually regret pulling her, I just feel like I'm not reaching her potential. Perhaps I'm just unfairly comparing her to the premium FUA team though.