I get that rooms can be changed fairly easily, and I like the new console, it just seemed like there was no real explanation for the new look. We don't normally see many of the other rooms in the TARDIS (except in "The Doctor's Wife" as you mentioned which I really liked) so the console IS the TARDIS for most people. So when it changes, at least to me, it should be kind of a big deal. Or at least a bigger deal than "I'm sulking at the loss of my friends/in-laws and don't want anything around me to remind me of them." Just my opinion.