Isobel fight is hard as it should be. I Play on tactical mode, and I failed miserably on first try, which had alot to do with being surprised. And yes it required a little bit of prep. But I succeded easily on 2nd or 3rd try. Id Imagine its a cakewalk on Normal difficulty.
Edit: correction, fight wasnt hard, protecting her was a bit tricky though on first 1-2 tries.
Larian, please DONT nerf any encounters, most are way too easy Even in tactical mode. People who cant handle a bit of challenge always have Explorer mode to fall back on.
I was on explorer.
Not everyone is as good as you.
One top of it, I did it before patch 1 where explorer was bugged and actually harder than balanced.
I'd play on explorer more but they disabled multiclass ability in it and that's a no from me.