I used to really like polymer frame guns, and they definitely have their place. Lightweight, easy to clean, and more often than not accompanied with a large magazine capacity.
Aluminum frames have many of the same traints, but end up more oversized and seem to transmit recoil as bad if not worse than polymer for more weight.
Then i tried a steel frame in a cz-75b and discovered why people like steel frames.
Yes it is heavier. Yes it requires more maintenance. However, the comfort/feel elements, particularly when shooting and not merely holding the gun more than make up for it.
I suspect this is one of the real strengths of the BHP design, and why it still has a strong following - because most designs out there also use steel frames.
I think steel and plymer offer very different tradeoffs in terms of benefits and sacrifices for both materials. If there is any dislike, it may be aluminum frames as the worst of both worlds.
I also think in time people will figure out how to make much more comfortable polymer frames, and get close to the weight/grip comfort/pointability steel frames seem to have naturally.