Had a family member staying at Pop Century a few weeks ago. Traveled with the DAK opening pack in the morning, only to then transfer over to Blizzard. Approx. 40 minutes.
On the way out of the park, the Blizzard Beach roads were congested thanks to all the Horizon Westerners congesting the Western Way exit, effectively resulting in another 45 minute journey back to your hotel.
I think closing BB, giving Typhoon a massive overhaul and expansion effort, and then having more efficient transportation can ultimately help them out. But the need for 2 water parks has obviously become too much for them.