Need reco's for a ROM to regain usefulness of my XOOM tablet

All,

Some time back, with the ongoing update of Google components, my Xoom tablet became virtually unusable due to the glacial response time. I lamented this fact as I did and still do think this is an awesome tablet and losing the usage was upsetting. I bought a Nexus 7 to replace it, which I use almost constantly, but there was always this thought in my mind of getting the Xoom going again.

Initially I tried the both the Lollipop and Marshmallow ROMs available from XDA, but frankly neither are "ready for prime time". There were and are serious functionality which makes both non-starters.

So, I installed OMNI ROM v4.4.4... on my Xoom tablet. Things seemed better for a while, but again the rot has set in and the response time of the tablet is glacial. Everything takes 30-60 seconds to respond and doing updates takes many minutes, not just a few.

I'm looking for options/suggestions/whatever on the possibility of bringing the tablet back to life.

If you have a Xoom tablet and it's still performing well for you, I would love to know details of the setup.

Thanks in advance