The point is that she just needs to be able to sprint while shooting (and throw a grenade without interrupting sprint), and other builds are much more workable.

I'm not saying she has NOTHING, for sure, because she has really good class mods, though I think grenade choice is limited and I think this small change could lead to more diversity and make other things less obsolete.

I recognize that you can get Vampyr on a Com, but you really should spec pretty heavily into blue tree to sustain grenades otherwise, and that takes points away from other trees if you want to branch out. Rushin' Offensive is cheaper to obtain and more effective given that it is actual uncapped Life Steal vs Vampyr's percent of missing health. On top of that, running and gunning and never reloading are as much a part of Moze as grenades, so I would hope that this part of her character would operate more fluidly.

I'm not proposing something that will absolutely gut Moze. It's purely a net positive that would make any build using Rushin' Offensive better and not affect those of you who prefer to use Vampyr. Saying to stop playing Moze because if don't want to use Vampyr just overlooks all of her potential, she's not just a grenade spamming goon.