I am a Mixcraft 6 Pro Studio user who uses EZD in just about every Mixcraft project I create.
I installed EZD2 without any problems. I haven’t started tweaking EZD2 within my Mixcraft projects yet, so I don’t have anyhing to share with you there I’m afraid. I have a few EZXs installed as well, and those didn’t cause any issues either.
Did you check the Mixcraft support forum? There are a lot of posts regarding EZD2 upgrade/installation issues and experiences in there.
It seems that EZD2 uses more resources (RAM) than the old version. And keep in mind that the current version of Mixcraft is a 32-bit application. Mixraft 7, scheduled for release later this year, will be 64-bit.