[jb510]

The 2.3 DL Driver has worked fine for me on all the 10.10.3 betas (fine meaning without any unusual problems).

The annoying bug for me personally has been the one documented in the DL bug notes:
On the Retina Macbook Pro, layout changes involving the built in graphics can log the user out. Again this is caused by Apple's Window server crashing.

That'd typically happen when I hit the "Show Desktop" hot corner.

As of 10.10.3 Beta (14D130a - Beta 7 I think) I don't know if Apple's finally fixed that... it's intermittent, but fairly frequent (once per day). Fingers crossed.

FYI, I've just updated DL 2.4b1. So far working fine on 14D130a with my Asus MB168b+.