For a moment I'm going to just ignore the fact you're cross-posting this everywhere which is kind of cringy but you want everyone to see your thoughts which is fine, but a few of them are inherently flawed and I'd like to touch upon this.
I’d love it if they allowed dancers to decide whether.
Adding gauges in stormblood and consolidating all actions to fit into the system was considered the selling point of an expansion and the entire redesign of combat what you're suggesting is multiple expansions worth of reworking skills, gearing, progression also in group content there is no world you get to pick and choose which you like. Everybody loves skill trees want to know the reality of skill trees? they get min-maxed look at WoW look at Lost Ark there becomes a right and wrong way to build your class and if you build the wrong way you are kicked from groups.
Hunt rework
Admitting here that hunt system is outdated and poor this is a terrible implementation there'd be no longer a need to hunt train on specific worlds if theres set times, so simultaneously you're adding AT LEAST 20+ light party instances to every single world do we even need to talk about how on expansion start the instance system handles things SO POORLY every expansion it's been flat out disabled day 1 so it can be fixed.
Give summoners back their pets
"No pets" doesn't even scratch the surface of why theres so much displeasure with the Summoner rework, you either didn't really play the job or you fundamentally don't understand why the reworked gameplay loop is unsatisfying to A LOT of former summoner lovers 'nuff said.
small customization of how a job feels to play.
See above, WoW skill trees, lost ark skill tripods, they will be min-maxed, you will be called out for playing inoptimally, skill trees will never exist in group content and again multi-expansion tiered rework for what will essentially be put in the balance and everyone will use those traits unquestionably just like BiS (Who actually runs numbers on their jobs gear/damage calc?) Not many.
Weapon choices for jobs
Flashback to shadowbringers, yoshida has stated Dancer uses 'range weapons' because they didn't want to lock dancer to ONLY chakrams yet they only throw squares and circles, ever wonder why whm/blm don't use shields anymore? waste of dev time to design all this, especially when job animations, design, are based around one weapon type, it's funny your example is monk since I'd say monk has the most varied look to their weapons out of any class.
r. The game is good not because of SE but DESPITE of SE.
As someone who works in the programming space and dabbled in game design and 3D artistry you have no idea what you're talking about respectfully, a lot of your suggestions require complete redesigns of entire systems on a scale we've never seen and your suggestions aren't fleshed out and fall apart completely under scrutiny.