There's a lot of thought that Engel's intent in the biopsychosocial formulation has failed and that actually the model is more divisive among its three silos than actually synthesizing anything cohesive. And that it's somewhat too focused on deficits. But anyhow that gets rather philosophical and unfortunately we're at a loss for a very good replacement model
I like the "Four P" formulation (which isn't really a replacement model but if you're looking for good ways to present...) it uses biopsychosocialcultural factors across all domains:
-Predisposing: genetic, prenatal, diatheses etc.
-Precipitating: triggers, how/when, temporally related
-Perpetuating: what keeps presentation going, chronic
-Protective: apparent internal and external strengths, buffers