would be quite fun.
For who, exactly? Certainly not for players unable to catch them at all unless they happen to have a crapload of nets on hand.
They work fine as they are, fulfilling their designated tactical role admirably while not being a jack-of-all-trades.
If you keep sticking upgrades to an already good unit you end up with another necrosavant – take a look around the forums and see how many people consider fighting something so brokenly OP to be “fun”…