I've never understood why they bother with the long range forecasts if they predict the next forty eight hours right it's unusual. Chances that the prediction for two weeks away is going to be correct slim to nil.
As to the redesign it just follows the ethos they usually go for
Add complexity being sure to enhance clutter clean design is a no no.
Make sure never to consult users, ungrateful buggers will just moan.
I too think it is awful. Also I need to do an extra click now to get my local forecast. Last time they changed it there was a feedback pop up but it hasn't appeared yet, perhaps they don't want the feedback!!