It doesn't need to be as powerful as Minikin Monstrosity's Refresh effect, but a natural Auto-Refresh Job Trait around 3 MP/tick or higher (at the level cap) would be a tremendous boon to BLM.
this would be equivalent to Refresh 1 and I can't see it being an idea that SqEnix will be thinking about especially with the ability for Refresh from subjobs. Even a 1mp per tick would be nice to see but every mage job is demanding that but the reason pld and SMN have it is due to their inability to rest while fighting. Smn cant rest with an avitar out or have to switch elemental for siphon if possible and PLD is the first person (in exp. parties) is the last one to that gets the option to rest and always the first one up to voke the mob. now with that said yes BLM can be used as an effective crowd control but there are much better jobs that can do this like RDM/BLM or BRD. Maybe a 2nd stun could be helpful to eliminate some of the trying to rest and recast because thats just not very nice to do.
Some of the casting burden was removed when they improved the casting time on elemental spells which does make things nice but MP consumption is a problem. If you compare a BLM to a DD such as a SAM you can get more damage from spells in the course of a battle but the time it takes to cast those spells gimps the ability to do that damage. where a SAM can meditate every 3 minutes and sekkinoni every 5 (natural) and can deal out a lot of damage shortly and then between fights the timers tick down.
Like WHM AF3 they have the ability to gain MP back based on cures, I would like to see this for BLM to gain back MP based on MP damage dealt Even at 5% of this an AMII spell can give you back 50% of what you just spent and considering the recast time it isn't that terrible of an idea. Now you have spells like your ja spells and me having an elvaan I can cast 3 of these spells and be out of MP and having even 5 % of that back would allow me to cast at least 2 more.. Now im not saying this needs or should be the exact mechanincs in it but thats what the developers can figure out but it would be a nice idea and something worth looking into because a blm on their knees resting is no better then a a melee without TP