One thing that I think needs to be said is that our rotation is simple to do, BLM is one of the easiest job to achieve perfect damage in a dummy, what makes us hard (and IMO fun) to play is movement in a real fight and how it means we have to sometimes save our offensive CDs to achieve better DPS differently from most jobs that'll just use their CDs ASAP, if you boost our mobility too much the job will be just easy and boring and if the mobility buff comes with no damage or party utility buff we'll still be the worse DPS in the game since we are 3rd (and way behind SAM and SMN) in personal dps on Catastrophe, a super easy fight when it comes to movement.

Some QoL like 30 second procs, less cooldown on Transpose, some way to make sure we get a Firestarter proc (loved that idea of getting a proc after using all Umbral Hearts) are all fine and help with movement in their own way without making us some kind of mobility god.

What I think the class needs right now is more damage and some small utility for the party (magic vulnerability up give us both and is thus my favorite idea) and some kind of burst window so we have better sinergy with the other classes, my idea is to boost Convert hard and also give it a 120 seconds recast so it will be up during party buffs like Hypercharge for example.