Re: [*NEW*] OxygenOS update 10.3.3 for OnePlus 6 & 6T
Full update in my opinion is always best. Seem to encounter less issues if you install the full update.
I can't understand why everyone is going mad about it over on the OP forums. Easily uninstalled, so not really an issue. Although I can't say I'm not slightly concerned that OnePlus might start this practice more widely in the future!
Re: Lollipop caused battery to drain faster
I had the same problem when I updated. Probably a bit drastic, but I did a factory reset in the end. It was a hassle, but it did sort the problem it for me.