I've got to throw my opinion in on this one .
I have built and flown several Senoir kits , with and without ailerons , barn door and strip .You cant go wrong with ailerons.
You must reduce the dihedral to less than 1" total (thats 1/2" each side) without this reduction ailerons will not be effective !
A flat wing works very well and is still stable enough to be used as a trainer .
The addition of strip ailerons requires a full length strip at least 1" in width with as much travel as you can build in. Strip ailerons combined with a flat wing produces the best aerobatic effects.
Barn door ailerons with 1" dihedral will give you an excellent slow flyer to perform some very low and slow antics (very cub like )
If you really want a fun slow aerobat flatten the wing , add ailerons , make it a tail dragger , oversize the rudder and elevator
Then challenge your local patern pilots to a game touch and go or follow the leader , or just amaze them that you can fly a pattern also.