I would like the option to hide or private my future concerts (without setting my whole profile as private)

"Bands seen" count should not include future gigs in my opinion.

I like using the sight to see upcoming concerts, but these concerts should not be included in the total. Too many concerts have been postponed or cancelled. I really don’t like using the upcoming concert function as it makes the overview inaccurate.

I like the recent changes where upcoming concerts are in the overview section but listed separately, but I think it's very important that stats only reflect concerts attended and not upcoming concerts like they do now -- that's what's currently keeping me from using this site for tracking my upcoming shows, which I'd love to do

Exclude upcoming concerts from your Overview. Update Overview (concerts, bands, city and venue) only after it moves to past concerts.

I agree with this. It’s annoying that it includes the upcoming concerts in the bands you’ve seen section. There should be a separate section for upcoming events or something like “tickets for”.