I think some of these changes are for S7a to get us through to the end of the Ponds' tenure as companions. From what I can gather, there's a new new title sequence coming for S7b, and if what I think is going to happen to her in The Angels Take Manhattan, the TARDIS may be regenerating a bit to go along with Matt's new look and change of character. That said, I like the new style in the opening sequence - I was never a fan of the big blocky titles, and I'm interested to see if the font for "Doctor Who" itself changes each week - my guess is that this week it will be reptile scales instead of Dalek bumps.