I know a lot of people dont like it but im actually liking how 40k 10th is going, rules wise, ease of use wise. Index era is whatever. People are too focused on indexes being bad/good and not looking at the overall game.
I didnt like AoS 3.0 at all. The irony of 40k taking ideas from AoS then resetting only for AoS to be more bloated and far more complex is not lost on me. Aside from the PL part 40k list building is super easy and fairly quick (for now). I dont like like anything about AoS list building or gameplay. All these actions, BTs, trying to shuffle units into a bunch of battalions that are largely meaningless, season abilities and battalions to keep track of. Then most of AoS warscrolls are super bland and not exciting or fun to use. Im siiiiiick of 'once per battle' garbage abilities and 'wholly within' can gtfo. 40k doesnt have issues with 'within' vs 'wholly within'. Even the new 40k app is better then the AoS app.
Ive personally also never liked how AoS is pointed vs 40k units. I would be okay with a hard reset to make things less wordy, less bloaty, easier to use.