Bring back spaces
The spaces where your defining feature, if you've decided to move on, please make 2 versions of the app. You didn't just release a new update, this new update is a different launcher.
Release an 'old' version of the app before smart stream. Don't support it but just release it for those who actually loved it. I know I can find an apk in the wild, xda probably has a whole section by now, but I think a lot of people not familiar with those forums will benefit from just a link to the old, glorious aviate we all loved right there in the play store.
You will make a lot of your loyal fans happy by making this gesture. Of course a setting to chose between both would be better, but a retired version of the app available to everyone would be enough to make most of us happy again.