Now I did the update from 45 to 48 on my XA2 dual sim. All went fine, and luckily I don’t have problems mit dynamic orientation and fulscreen video play in chrome-based browsers. The dynamic orientation though seem to stuck after using a while, then re-starting start screen etc. or android support helps.
But it’s wise to not ignore warnings related to 2 libraries before updating as described here: IS IT safe to install 4.0.1.48.
Also, having newest aliendalvik-control and avoiding issues with apps installed via storemen should be considered.