Sea Wolf 2 is already in production, so 'de-inventing' it makes no sence at this point. Moreover, its considered to be a both a manoverable and accurate missile, with good jam-resistence, but, with out good refernce base i am not getting too wrapped up in that debate. IMO its good, and good enough for duke point defence needs for the future.
I do agree Aster should be the standard SAM for the RN, and it will no doubt be on FSC (if it ever gets built) it will be the SAM of choice. However, the Aster 15 is over kill for a patrol like corvette, thus, RAM or MICA VL are my arguments for a SAM system. These vessles need to be afforable so they can by purchased in some numbers.
Daring apparently had provide for a point defence missile system, at this point i;d image it would be MICA VL, it uses the same asctive seeker as aster, its vertical launched, it can employ an IIR seekerwhich as a surface attack role. I think it would be a great suppliment too Darling and good for a corvette. Saying that, RAM, which is in production and its low cost makes an attractive option.