[bluefeet]

Your spending your chips for the wrong reason, at the wrong time.

IMO you should be looking to -- keep the pot small, while waiting to improve -OR- moving aggressively, once there are enough chips in the pot to warrent the risk...with the latter not being particularly mandatory.

Your line accomplishes neither. Leading (even full pot) 5-way is not going to take the pot down often enough. You will either find yourself unimproved, still OOP on the turn, facing now a very large pot (with a further committed opponent), or you will be met with a substantial reraise - maybe for all your chips. Are you willing to CALL your chips AI here with the second-nut, non-paired flush draw in L2? Because that's essentially what you'd be doing when considering "I can't imagine folding anywhere on the flop with this hand" by taking this strong lead line.

Your best case scenarios with your line are 1) they all fold, or 2) you ONLY get called, and hit the 4:1 on the turn (and we don't run into the pesky nut-flusher).

I agree that not folding the flop acceptable. But only when YOU are in the position to maximize your FE, putting someone to the test for all of their chips, after THEIR lead (perhaps after making a small 'controlling' lead).

Check-calling with the odds to do so of course is the other option.