The most interesting buff to Eyebots I could see, that wouldn't totally screw players, would be making them Gravity Immune. They already can't get positive speed boosts, so making them immune to negative boosts (given their terrible speed) would be nice. I've posted before that increasing their attack cooldown by 1 second, but keeping their DPS the same would give them a stronger out-of-cloak alpha attack for assassinations, but it gets really scary for players. But maybe a change to multipliers would be a better solution, so at least Human Command Stations don't die any faster than they already do to a wave of Eyebots.
On Vampire Claws, I just wish their vampirism ability was stronger. It just seems to never make enough of a difference. On paper it looks like it should work out, but I think the problem is melee ships don't actually get their paper DPS because they are "out-of-range" of melee attacks in between swings which causes their actual attack cooldown to be slightly greater than is listed. Which is doubly a problem when a units survivability is based on damage dealt. I mean between Shredders, Claws and Cutlasses, Claws have the lowest health and around half the ship cap. They are super fragile in practice.