this hand seems like the quintisential WA/WB situation. mainly because if opp has a flush draw he isnt going anywhere, but if he makes a big bet anywhere along the way, without a solid read we have to give him a hand that beats TPGK.
on this board only draws and hands that beat you are calling. if you cant reliably tell the difference between a missed draw trying to bluff the river and a made hand making a value bet on the river, then I think you should treat it as a WA/WB situation. this way a lesser ace could bet into you, the 8 or the J may even bet into you on the turn if its checked around on the flop. either way, without a dead solid read a cheaper showdown looks like a better line, and the way to the cheapest showdown would seem to be check-call. the only hands that would fold to the flop bet are those that missed completely, or the baby flush draws (possibly, though they may stay around. i have seen someone chase an 8 high flush where only had 1 card of the flush suit).