With regard to Per Room Guest Spending (PRGS), Disney's plan appears to be to convert rooms to DVC.
With regard to Per Capita Guest Spending (PCGS), I tend to agree that Disney pushed too quickly on price increases from 2010-2013. It looks like the growth rate of PCGS is slowing down this year.
WDW prices are reaching a tipping point. In recent years, increases have far outpaced people's abilities to pay them.
Getting guests to spend even more on what they already receive (e.g. charging for FP+) is only going to boomerang. It will drive sufficient numbers away to largely offset any gains from potential FP+ upsells.
No, what WDW needs to do is attract more business (by adding new experiences) and improve guest satisfaction (by increasing ride capacity on existing attractions).
Only by investing in WDW is Disney going to improve WDW's financials.