Trying latest now. Finally made a Nandroid backup, so hopefully recovery from Sleipnir will be quick if necessary.
This one appears to do a lot better than the prior version. I was able to install everything no problem. Run multiple apps initially worked well, but I've bogged it down now. I was able to get Candy Crush working. I've set my app limit to 3 and we'll see how it goes. But it's way better than before.
Waze and Google Maps both seem to work much better. Maps didn't require Text-To-Speech which seemed to be required in the prior version (and failed).
As far as Google Apps, I'm using the version that was there previously without issue.
Given this version is so much better I'm going to give it a good try!
My only real complaint so far is that I can't get rid of Google Search. And it heads every page.
Google Calendar needs to be updated to work.
Now the thing has problems installing apps... Sometimes it won't start download. Sometimes, it will. Sometimes it gives 961 error. Right now it's trying to install Action Launcher and it's taking forever. It shouldn't. I've fixed permissions and cleared out Google Play's memory. Who knows... Edit: Latest play store seems to have fixed it - thanks @Dark One.