>>2025660
I mean arcanas resolve both of your concerns quite handily, they are powerful enough at baseline that unless you are participating in difficult content you can basically just ignore the intricacies of gameplay if you are sufficiently invested. Arcanas are also mandatory specializations so that you need a team.
I run into a ton of pugs that don't know how to debuff and play like clowns (in fact they're probably the majority of pugs) so lack of knowledge/experience is rather commonplace, as is not using all the tools. It also demonstrates despite being given a lot of progress on a silver platter, players still have a long way to go when it comes to understanding and properly playing the game.
As for the insane amount of time, see the other subsystem grinds, life skill grinds, gear-related grinds (erg!), etc. Needing to grind skills was fine when skills were the majority of the grind 15 years ago, but it's not like that anymore. Much to my chagrin, but we can't change the past and nuke C6/C7 director from history, we can only deal with the present.