I think the smart disc is actually pretty close to being good right now, but even if it becomes good ( longer range, better control, different speed levels ect… ) i think its implementation isnt that great, even if it makes for a decent room clearing weapon.
An Idea i had was to change it so that it becomes a lock on weapon for medium range.
Make it be usable a bit out melee range so it can be thrown from a nearby roof, or used to strafe around out of knifing range.
Drop the weapon damage down to 80, and make it lock on to a target and be capable of strafing around.
Keep it so it doesnt take you out if stealth, but it still comes back to you and would have shorter range in general; making it still possible to give your position away if they watch the disc, this would make it a more usable weapon instead of just having niche uses.
Just a thought i had.