Clean flash is always better. Lineage apps need to be flashed every time anyway.
I was too lazy for a clean install, dirty flashed onto the older one.
+ flashed lineage apps
+ flashed minigapps
+ flashed bluetooth patch
... seem that everything works fine... no bluetooth drops till now.. good job nut! thanks!
.. also the battery seems good as before ( It was GOOD for me)
.. no annoing lags till now.
Thanks again and good luck for your exams!