It is unorthodox but increasingly viable I’d say, particularly now that you’ve got “Rich Man’s Guard Dog” for extra anti-cheatin on hearts. I feel the straight-flush hearts probably works best as a gadget deck, but maybe it works as a huckster deck too.
A straight flush on hearts would even help avoid the negative results for pulling clubs on “experimental” gadgets. 
It might not be “tier 1” competitive (shudder, forgive the terminology), but I think it would be good fun and an enjoyable experiment (appropriately).
One issue might be forcing shootouts/a win condition, as clubs tend to help with that. However, if you’re able to reduce influence via bloodcurses or some other mechanism, and/or shootouts via dudes/goods, then it could have a late game solution. Or just drop so many deeds (secured stockyards, miasmatic purifiers if running gadgets) that you rush to a control point victory.