The TP changed was meant to fix a bug with Asuran Fists and the Relic Knuckles where MNKs could spam Asuran Fists essentially forever after building an initial 100 TP, it was never intended as a nerf.
That aside, it really never changed much, DRG/SAM was garbage on IT mobs and only somewhat decent on VT mobs but no one XPs on VT mobs except at 70+. The only job that could viably sub SAM in XP prior to that Nerf was WAR and even then /THF was better for pure damage and /NIN was solid. If anything, it actually made RNG a little more powerful because you could basically out spam a RNG on Ts/VTs thanks to the SAM sub.
Anyway, BLMs need a minor nerf in the -ga department. -Ga spells are just too powerful and should scale weaker than they are now because it's allowing BLMs to just nuke the hell out of multiple mobs at the same time, something they shouldn't be doing for game balance purposes. That and BLMs need something to bruise that big ego they've built up. Thanks to the events that have recently happened on my server, BLMs really need a gut check. I'm glad the devs think so too.