Agree it gives us options, and I'd personally be reluctant to see Flynn pushed out wide, and would be tempted by a mobile, niggly Foley-Flynn midfield base. That said, Flynn covers so much ground, he might do that 'wide-ish' role well, too.
I know people keep saying Magennis needs to play in the centre, but managers keep on not playing him there.
Edit: re McGinn, I think it's clearly his mobility that's starting to let him down. If we are to use him sparingly, you'd assume he'd be getting dropped for games against better, faster teams. After seeing Motherwell vs Morton, the idea of their pacey players running at some of our guys gave me the fear.