I wholeheartedly agree here and NBC 10 is really showing how to send someone off, with interviews and segments for Vai and gradually easing the viewers into his transition out. [totally not thinking of WTTG or anything...]
As for channel 6, I think they run a tight ship there -- the people who are loyal to Tamala and Matt probably would never leave, and Karen and David are also an institution themselves -- simply put, that's a family I don't think anyone wants to see broken up. But I think NBC has sensed that there's an opportunity to liven up the 4-7 morning newscast and maybe bring a tiny bit of the Good Day Philly Alex & Mike vibe into their thing (I mean Alex did go viral earlier this summer), and it will come down to how people will receive these new, likely less-traditional/more youthful changes and if that really makes a good impact....or if they'll be forced to change right back into the traditional format after sweeps, and then compete in a different way.