I would agree that this is incorrect information from the CM from the getgo.
Not only is Disney advertising the show locally with it's grand opening, it is advertising it internationally including a massive print push in the next two weeks. It will not close the next wekk.
The floor already HAS a dance floor surface to as much of it as they can that does not effect the sets.
As a musical theatre director, I can tell you that shows don't work that way. If they were going to close the show for refurb, it would be closed right now, and the opening pushed back to March. That is not what is happening here.
Similarly, there are NO changes being made to the script or music at this time -- the show itself is set.
The problems the show has been having have been with technical aspects -- in particular two sequences in which the entire set changes and is replaced by an increasingly intricate set - as the two sets pass each others in the rafters, their batten's have been having trouble passing and it has been upsetting the light scheme as the rods bump. Because the light rods also hold and buffet all the flying equipment and movables, this has needed readustment and tweaking.
Shows that have not completed have done so because one set is stuck and the next can not be lowered or fixed with the audience in the house. Hence, the show ends and the cast is sent out - the sets reset and tested, then back to business.
It IS true that Monsters Inc at MK will be down through March. That has been pretty widely announced.