Asked ourselves the same last night,I sit next to the Mrs,but our son sits on the row behind us about 3 to the left,so not together as a 3 if you get what I mean,so if say he got a ticket and we didn't or vice versa,that would be pointless really.
I've made my mind up what we doing anyway,but when I read your post I thought I'd share the same thoughts and feelings you have,as I'm sure there will be loads thinking the same as well.
Chances are we won't be in our regular seats and just be allocated a seat based on how many seats requested (assuming it's based on family and friends already linked) so this might work in your favour and be sat together