I'd love to see a skill tree featuring shotguns. With something like getting a crit kill increases accuracy for a bit. Depleted shield and health increases damage. Would be awesome, we shall see.
Or something that would turn every shotgun into a Hyperion shotgun. The accuracy increases as you shoot it. I LOVE Hyperion shotguns because of that. --- I have Dysarthria. It's a Speech problem. Your question is answered now.