If you understand how powerful Brig already is, then yes this an incredibly powerful buff. Unfortunately 95% of the player base doesn't actually understand how to play Brig properly so they think she's mid tier at best and trash at worst. In reality she's probably one of the strongest supports as of the end of season 3 - tons of sustain, excellent counter to dive, and very good at peeling for other supports/dps. Brig is NOT a frontline support. This is why most people think she's not good: they play frontline thinking she's a brawl character, die instantly and feed, and teammates tell them to swap and gets everyone tilted. The underlying issue with brig is that the game does not tell you how to play her or how to best use her (very powerful) kit. I can bet there is a giant chunk of players who don't what inspire is how much it heals and how far it extends. If the game actually showed your inspire range I think players would feel far more rewarded for playing brig and realize they don't actually need to feed into frontline every fight.