They're more than slow at cleaning up the mess. They should have been doing that since Dan took over instead of bringing in the iPhone to try and say "we got it too". Sprint needs to compete more on price and be a 3rd ranked carrier like they have been for sometime. Recent numbers show that post paid is going down and prepaid is up along with shopping on price, and Sprint should be playing that number game. Hell, I can get 2 phones on the Sprint network, unlimited, and still come out for the price of 1 phone on Sprint's post-paid plan.
And NV will take YEARS to complete at Sprint's phase, even if Softbank gets the wheel- and by the years of upgrading VZ/T will out due them in $$$ and in terms of customers. Sprint will never fully be able to bring their name back.