It seems that no one has looked at the plans for her. Moored in London, conversion to hotel, conference facility, museum and use by Sea cadets. So the argument about compartments etc., is null. The idea of the crowdfunding is that there are several millions to be donated, on the provision that the public want this, which is only fair, for if you are going to invest in it you want to be sure that the public will support. If you donate and it goes "boobs" up you get your money back. Some nice donations there. Initial surveys show she is ok to sail back to UK, which is a start. HMS Plymouth was total disaster from start to finish, poorly managed and the bid was poorly led, which led to her demise.
Personally I hope this bears fruit, for we have few ships preserved which is a shame.