I consider myself sort of ‘middle’ already, but in such a sense that even ‘middle’ feels like too defined a term for it.

Like, I wouldn’t want to fall into the fallacy of the golden mean. Which is why I so often just avoid chiming into conversations where ‘camps’ exist, because I can’t precisely articulate my own position.
Basically if I have any ‘position’ at all I’d say its one of (attempted) flexibility? To be able to see goodness wherever there is goodness, and appreciate that there are probably multiple ‘good’ ways many things can be done? And that very little that we’re doing today, as it exists today, is as good as it could be, so regardless of what we’re looking at, some kind of movement is needed? And which kind of movement might depends a lot on the local community and I don’t feel qualified to suggest imposing a single ‘thing’ across all communities.
So there we go, that’s an example of the unhelpful non-contribution I have in my head when such topics come up. Haha. Whatever part of Christ’s body I am right now, I think I’m a flexible part that’s ready to adapt to multiple possible directions my local community might go (while thinking that regardless of what direction it goes, there’ll probably be gentle counterbalancing suggestions and supports we all might need to provide).
PS one good thing I’ll say about the ‘camps’ situation (a silver lining, if you will)… Even from such apparent division or stress, I think God can bring something good. And I think the fact that battle lines exist, and there are people willing to defend both sides (while longing for unity) is a sign that there are things worth defending on both sides, so some kind of eventual synthesis is (in my mind) probable. Synthesis slash mutually respectful mosaic. Eventually.
PPS on your exact example, yes, OF celebrated ad orientem (and maybe with more traditional, less hippie-ish music) is exactly one of the happy middles that would please me. I know a parish like that and it’s my favourite. (Maybe we shouldn’t have favourites. But… that one’s my favourite.)