Interesting that the MoD is planning for contingency operations or interesting that an aeroplane with far greater wing area and no lift fan can take more petrol and more bombs and therefore might be deemed more useful?
None of this is news. You just have to choose which camp you fall into:
1. We are broke and cannot afford carriers full stop. (Gloss over magic acquisition of C-17, reprieve of Puma etc etc as signs that we aren't.)
2. Anything's better than nothing, buy the B. It'll also save no end of time getting the ships rigged up. Might cost a bit (lot) more and could even fail altogether, but them's the breaks.
3. Last manned aeroplane. Buy the one that goes the furthest. Don't accept that it'll cost £1.7 Billion to fit out the ship(s). Invite USN and the French to embark occasionally as well.
4. Ask nicely for some Super Hornets to tide us over and then join the chaps in option 3.
5. Conveniently forget that this is and always has been a Maritime Strike capability and talk about it like it's a GR4 replacement.