Unstoppable Nanites doesn't really seem to be a very good benefit to start off a faculty. Boosts primary use as far as I've seen is for medium BAB characters who don't have the accuracy for full-attacks to be reliable enough.
It can see a lot of people literally never having a time when it'd be useful, because even if there is a time when they're only making a single attack in the turn, it's likely because they're moving in that turn, which is incompatible with using boosts.
It also seems odd to have the first technique conflict with the final technique in regards to what sort of attacks you're performing to try and benefit from your class features.
If it could be done as part of making an array it would be nice.
I also think it helps the nanocyte early on who has focused on CON > DEX or STR, who maybe isn't as accurate as a normal full BAB character.
Still not great though, and definitely no synergy.
I agree that generally Unstoppable Nanites wouldn't be good. Its generally a loss of average damage in comparison to making a full attack. But the Nanocyte has a lot of uses for swift actions, and this ability helps let them weave in form changes and other stuff without losing quite as much.