I think so, too...and I'm going to be messing it with it no matter what you decide, Keleth. I want to make it work, and it'll be a good little side project for me to entertain myself with.
One of the biggest problems I've seen with Discord, whether you use the webapp or the installable UI, is that it uses a LOT of bandwidth and resources...at least it does on my machine. I can't run Discord at all when my wife or kids are watching Netflix on the XBOne or WiiU, let alone run it while I'm playing a game and they're streaming a movie. If Discord isn't running, I can play whatever game I want for as long as I want, and never once interfere or force a buffer on their shows. Mumble, on the other hand, has (so far, anyway), been less resource intensive, allowing me to chat and play Overwatch while the kids watch Netflix or Hulu without a single buffer moment or broken audio because of a bad connection.
That's just been my experience with it, though. Discord looks prettier, but Mumble sounds and runs better. I have no problem running either way...I just might not be on Discord much when the wife and kids are home and awake ;).