This is just fanfic masquerading as a rework, like someone going "XIV's job system needs a rework, so as a suggestion here's my in-depth description of a <job they want in the game>". None of these are particularly new/unique either, and are pretty similar to things xiv's done before.

1) Gathering orbs while managing a counter / not letting it get too high is something they did in the Chrysalis, back in ARR. They're not the exact same thing but this wouldn't be something someone would go "oh, how novel" over
2) Personal mechanics are a thing, though I don't think they were used a ton until recently, but for example the chains in m3s are only visible to the affected player (like the riddle). Otherwise this just sounds like a pass/fail thing like Bardam's, though it depends on the actual form the "riddles" take (which you didn't actually expand on)
3) This one's kind of unique, but fights that require people to go around interacting with things instead of fighting have been done before (a2, a9) and people tend to think it's more annoying than not. I'd be up for seeing more item interaction fights again in the future though.

They could work fine as fights, but none of the descriptions here really sound like they would be meaningfully more interesting than what we've already gotten, which contain a lot of ideas similar to the ones being mentioned here.