It is a common sentiment that machine empires - and most kinds of artificial pops - are underwhelming in the current version of the game. More specifically, they: need to invest more in pop growth than organics for roughly half the effect, are energy starved and the 100% habitability bonus is somewhat offset by the administrative cap penalty (over which you don't want to go, when the good part of your production is dedicated to just keep your pops powered). As a result, they can't properly lift off in early and midgame and become competitive only in fortuitous circumstances, like the AI empires doing nothing while you crawl your way into the game. Some re-balance would be much welcomed.