You don't need a trail shoe for those distances / terrains. Nimbus is a neutral shoe so won't have corrected your pronation but also won't have made it worse if that is your normal strike pattern. You could try an inner sole in the Nimbus before splashing out on new shoes.
Bottom line... If you're going to pay good money for good shoes - go to a good shop for good advice.
I took it to mean that they were going to open it for a certain number of entries every day of that period to make it fairer for those applicants who can't get to a computer on one date only. There will still only be a finite number of entries though. I think that was it anyway
I'll do marathons again (2 booked for this year). I like half mara distance as well. Actually, I'd like any distance right now! I also need to shift at least a stone of lard that has crept on while I wasn't paying attention.
Good luck with your return to fitness and with life in general. I hope your woes are all sorted now?