I understand your point, I just don't think that's what would happen. The aren't going to think about those things anymore than they think about slippage with

I understand your point, I just don't think that's what would happen. The aren't going to think about those things anymore than they think about slippage with a market order. Whatever you give them, it won't match their ideal of fill me now at X price with no errors and they're going to complain either way and they're not going to think about it beforehand regardless of the default.