Based on what I've heard, foegele and z have been awesome. And I've never been that impressed with mcginn, honestly. I think he should start on the 4th.
I think RBA is using this preseason the way a preseason *should* be used (and how we've begged coaches to use it in the past). You try stuff, see what happens, and keep it all in the back of your mind for when you need it later. What's the point of using preseason minutes watching guys you know work well together? With two weeks to opening night, I don't think Roddy is done experimenting yet, so I wouldn't put any stock in the current lines. To me, the only concession he's made to putting guys together who he already knows have chemistry, is getting TT back with Aho, since Aho has been underwhelming in his move to center. Hopefully, having TT back will kick Aho into gear and we'll be good to go.
As for McGinn, specifically, I think he's a perfect fourth liner. I think Foegele is the better player and should probably play higher in the lineup. However, we already have three rookies who are locks for the top-9 (Necas, Svechnikov, Zykov). Foegele would obviously make four. And if worse comes to worse and we have to move Aho back to the wing, Wallmark probably centers the third line, making it *five* rookies in the top-9. I just don't think that's workable.
Even if Aho sticks at center, Wallmark has to clear waivers to go down and Foegele doesn't. I'm watching Foegele and I see the same things everybody sees. But at some point it's about numbers. Is it worth keeping Foegele *and* McGinn if it means we lose Wallmark and have four rookies in the top-9? I just don't think the math works, and Foegele, for better or worse, is the odd man out.