I agree, but now that mine hunting is being done by unmanned systems, it could be incorporated onto any given platform you choose.
The issue with using the AOPS in the way that you mentioned, I believe, is with the number of ships that will comprise the class. With only 6 hulls, doing OPV stuff, OP CARIBBE, Africa missions and arctic patrols, they are likely to be very busy already. (...) when the time came to replace the MCDV, the Navy could go looking for a class in between the AOPS and the frigate. Better armed than the former, but less expensive to operate given less displacement, hull form etc . Also cheaper to operate than a frigate, but more effective in a conflict than the AOPS.
I suggested the RIVER, but it doesn't have to be that exactly. (...)