The droids are good, yes, but gamebreaking, I wouldn't say so. I would say what puts the good guys in this match at such a disadvantage is their positioning, Warhead and his troops have the high ground in this match. However, neither side knows exactly what is going to come out of that temple yet. Somehow, I don't think it is going to be friendly.
Also, looking back over the sign-up topic, the droids are alright stat-wise, but certainly not better than what the side of good/Avalon have to field and, the droids don't have any heavy weapons either. I think that the droids will prove necessary to make this an interesting battle, as they are the bulk of Warhead's army here.
We also haven't had any of the good ranged troops get into range of the droids yet. This is actually fairly well balanced, but the irregulars chose to rush towards the side of the hill with the ranged kill bots, rather than the side defended by the ninja, who have no long-range options, which is why they were ineffective. Of course, however, seeing them all get shot down was pretty awesome, and they aren't out of the game yet. I, at least would like to the see battle to it's conclusion, without outside factors eliminating an entire faction with no carnage.