As one who is waiting for it to be opened (Wedding anniversary festivities will now have to take place elsewhere!) I would have thought a change of use would have been sorted out earlier but then perhaps spending lots of money before getting the relevant permissions is usual.
Some of these licenses and permissions can't be applied for in advance, as the relevant authority needs to see what you've
actually put in place, rather than what you say you will put in place (probably, maybe, if you get round to it....).
But an 8 week delay in being reassessed (assuming the issues raised can be resolved significantly sooner) seems excessive and obstructive.