Flat calling is not the end of the world.
mmmh, maybe not but unless we decide to take a super passive line for the whole hand, and wait for the lottery to hit, I hate playing JJ in a mutliway semi-limped pot (can't see the two limpers folding to MP2's minraise, not even talking of giving a good price to the CO and button to call in position).

I don't like flatting here. Heads up in position against a tight opponent, maybe.