I swore I wasn't going to join this conversation (and I hope I don't regret it) but here goes... I was 100% sure that Pop was always more expensive than All Stars and I started pulling out my trip notes to prove it (or at least confirm it for myself). We've stayed at Pop in 2004, 2009, and 2011. We also have considered staying there on our trips in 2013, 2015, 2016, 2018, and our upcoming trip in 2020. I have trip planning notes for every trip -- particularly the cost of various resorts and their logistical options (we travel with several kids so we've always needed 2 rooms or a suite). It pains me to say this, but according to my notes, the rack rate price at Pop and All Stars was the same when I was researching pricing for the 2004, 2009, and 2011 trips. Pop was ~$10/night more expensive than All Stars in 2013 and has been more expensive every trip since then...topping out at ~$35/night more for the 2020 trip. So up until about 2013 (possibly 2012..didn't plan a trip that year so I don't have notes), the price at the 2 resorts was the same..at least the rack rate for the dates we were looking at booking.
Just to keep this post on topic.... Personally, I wouldn't pay $35/night more at Pop just because of Skyliner. But I would pay that much more because I like the atmosphere better than All Stars (where we stayed before Pop opened).
Hoping I don't regret hitting the "post reply" button....