They're definitely oversupplied with lagers, no doubt. I do think the stouts are sufficiently different, and they are "The [b:14i65klk]Porter[/b:14i65klk]house" after all.
I take your point about the Hooker knock-off and the willingness of the market to try new things. But if you're not doing stout or lager, and you've tried and failed at weiss, you're doing a pale ale of some sort. A blond ale would be too much like the lagers, so a medium-dark one seems to me to be the obvious way to go: either a non-nitro Irish red, or something bitterer, like the Hemp beer. Or both. And a rauch beer. And another stout. And some traditional Blanchardstown lambic...