I think in terms of survival, swarm intelligence seems to be the way to go (based off where it seems the world is heading today. I dont have much evidence to go off of besides that). But if life worth living if it cannot be experienced subjectively?
Well-- I mean-- I like emotions, I like being human. But I've never not been a human. In fact, this question in quite erroneous. Few people who have emotion and a sense of autonomy would never want to succumb to cold logic and collectivism, except in some extreme occasions, but no people who have succumbed to cold logic would want to return because emotion is, more often than not, illogical and irrational.
If we aren't human, what benefits are there? There's no good in the products of our intelligence if they can't be enjoyed by conscious beings.