When you think about it as 2 people, each 5 boxing, I think you'd like it a lot. Then you could level the 2nd group together, should be fun.

I think doing a raid with all 10 would be extremely tough. I'm sure it can be done, but it would be a lot of work to get a fight down. You're better off bringing 2-3 of each to a LFR.

Also, the timeless isles is a lot of fun, you could have 2x 5 man groups and go kill all the elites and get gear when you're 90.