One thing you have to take into account is guys going from NL to AL are facing hitters who have never seen them before, advantage =pitcher.
Imo, Chen should be solid, miami is a large ballpark and NL EAST doesn't exactly have a murderer row of hitting outside of Bryce Harper and David wright. and he comes from AL East where he faced blue jays, yanks and pitched in fenway regularly.
I Remember Shark was fairly good with the cubs a few years back, also Cueto but likely not gonna see much value from them. Outside of Arizona and colorado, they'll have a fair amount of games in pitchers parks.
Fister spent most of his career in AL, if he can get ground balls like before, he could see some early success in the AL. If not, in that sandbox of houston balls will fly out in bunches. I was gonna look to fade him during the second half as he has shown signs of breaking down after a handful of starts, but he has already shown signs in spring training of being the same garbage he was last year. But again, it is just spring training.
Alvarez gets to pitch in oakland, which I think is a good fit for him, but he can never stay healthy.
Good luck this year.