What is this obsession with that bloody bulldog?
You do understand that most people will have forgotten seeing the thing on the desk in the PTS by this stage and won't give a fu*k about it anyway?
I think it's just supposed to be a passing of the torch kind of thing.
I think the film might still end on the roof. Bond could go into the old office, find Mallory in there, and storm off onto the roof. Eve goes up after him and cools him down a bit. They talk about Dench-M and he asks her to give Mallory the bulldog, or put it on his desk, or whatever. Then we see Bond looking over the London skyline and the film fades out.
Don’t you think that an epilogue like that, with little hissy fits and storming off to the roof, would be a bit of a damp squib?
Anyway, the production design wall that prompted the M's office theory was in order of the film, hence what started this - it showed the offices after the roof.
Also, for the bulldog to have a symbolic 'passing of the torch' power, it would have to be more than an ugly paperweight last seen on a desk in a building that was blown up over 2 hours ago.
Perhaps there is a protracted sequence where M, her eyes streaming with tears, rummages frantically through the rubble of the MI6 building. Her stockings laddered, her face dirtied, her fingers bleeding. She pushing aside debris and the bodies' of dead agents until she finds her blessed bulldog paperweight - mercifully intact!!! She clasps it to her breast.
"This is a sign!" she cries. "Even if I can not go on, this bulldog paperweight MUST go on!"