Yes, as I have mention above as well, changing the AF size will help a lot.
Don't need it to be Max size.
2nd size from smallest should work fine.
I have that as default on my Q.
Hmm. I always set my Q AF points to the smallest. Seem to work ok with the 01 lens. But I do agree that the lock on is not always. But seem the DOF is larger than my K5 and K01. I just focus on anything which is close to the less contrasty area.. Seem to work well. lolx..
But I will try your advice also to see the difference.

Hmm.. JK, sound like you own the Q10 already woh :X