This wouldn't fix anything. Maybe in pvp if you're concerned about that but in the rest of the game the only improvements that would be made would be for the next expansion, or maybe some small adjustments towards healer content in this expansion.
Seriously, take a look at BLM's kit outside of pvp. Look at the mess it is prior to around level 50ish. Look at how much instantly becomes redundant around that time. Yes, it's perfectly fine for endgame, it's doing incredibly well in endgame pve and pvp, but the leveling process is gross, as if they swept all the problems the job had in its earlier levels under the rug. It's not even a level sync issue, where most classes feel bad. No it's incredibly awkward as a whole.