I spoke to one of the curators at the AP yesterday and specifically asked about the roof caving in. She said that although the roof is in sad shape, has leaks, etc., it has not caved in. Yes, the leaks are there but this is not a recent event. Most of the palace is still owned and occupied by a government organization, and presumably they are working on making sure that more damage is not done through the roof in the winter. The palace is indeed in very sad shape and it does not look like any restoration work has been done on it since last year when I visited. And it won't be until the palace belongs to the TS Museum.
The left wing, where the permanent exhibit is located looks better than the rest, but I am not sure if this is just cosmetic. About three fourths of the palace are more or less falling apart, at least this is the way it looks to me. In the back, where the entrance to the oval hall is, the whole area looks completely neglected, and overgrown with weeds. It is also fenced off with barbed wire, so you can't get near it. It's very sad actually.
I am hoping, as I am sure many of us are, that the transfer to the TS Museum takes place soon and the restoration work can begin...