I think Strome is a reasonable 3rd line center with upside. He's played well with offensive linemates but hasn't gotten the chance to play with many so far. I hope him, Cammalleri and Slepyshev/Caggiula can find good chemistry as a 3rd scoring line. Strome is a good passer who's comfortable carrying the puck and with 2 shooters i think that line can be solid.
As for Strome not being able to play with McDavid the guy played the first 2 preseason games with him and was productive, Draisaitl on that line has more to do with giving McDavid help with faceoffs, dzone coverage, and producing consistently as that line is being tasked with harder matchups as part of McDavids development, plus they don't want to bury Nuge for a 3rd year.
Strome is still a young center and he's on a new team for the first time, no need to run him out of town since up until 2 games ago he was literally our only productive bottom 6 forward.