It would be nice to be able to hide some of the sub forums out of view as every week it seems to a new addition to the roster.

You can hide major groups of forums. Simply hover your cursor on the dark blue bar where the "Group name" is, and click on the "minus" (-) symbol. This will collapse all of the forums within that Group.

I've done that, but in some of the groups of 10+ you only want one particular forum so it's still a long scroll thru.