I agree. Interceptor is unplayable above Hardmode. Melees hit like a wet noodle, can't critically hit and there is 0 synergy in this game regarding melee combat.
Bioware got it right in Mass Effect. Here, it is absolutely brainvoid. No shield leech or shield restore for melee combat and no meaningful damage upgrades.
How is a meleeceptor supposed to remain in close combat ? And you even put a cooldown on their dash ability. This is not a good idea for a class that has 0 tankiness and relies on mobility.
Melee should be deadly to foes, due to the great risk. But it is not. In fact, Melee is currently the weakest form of combat, yet the most unforgiving.