A lot of you might go wrong because 15.1 supports treble
Treble is new from Google to make it easy for Samsung and others to update their hardware.
With this they create a new partition on your phone called: vendor
Use the recovery for T810 in THIS POST
Use the ROM posted by bonuzzz HERE...
I just installed latest build and used the last twrp posted in this thread.
When I installed LOS + GAPPS = bootscreen
Then I installed LOS again without GAPPS and bingo... even got GAPPS on it...
Make sure when you install latest twrp, use advanced wipe and clean all without...
Like most out there, I use Nova launcher Prime (paid)
You can set it any way you like and make it look awesome.
It keeps being the best and fastest launcher out there.
I tried most of them, but they all seem to miss something that Nova does have.