[intellegacy]

I actually don't think you should ask him to leave yet.

Because what it sounds like is that you haven't communicated very well with him (understandable - you've been busy).

He may not even know that you guys are having issues with his performance. I'd sit down and talk to him first before deciding anything.

[wussyib]

Your assessment is correct in that this issue has never been communicated before. We're only 1.5 months into the project, so it hasn't had an opportunity to happen until now. Which is also the same reason why it's scary. If one can't stay motivated for a handful of weeks at the inception of a project, how's that going to look in a year?