Is this game pay-to-win? In short, no.
At least I don’t think so… there are advantages to having premium (who would buy it otherwise) but who cares… if they get new parts 1 week before free players really, lol. That’s nothing compared to other games. So Robocraft wins.
And if you are that concerned but can’t spend a buck then use the hacking tool I posted some time ago. It will give you many better advantages like unlimited CPU, OR you can use it to get premium for free. Epic win.