I agree with your comments about stuff being delayed (Bourne 2020, JW 2021, new park 2023), but I disagree with the sentiment that there were tons of awesome lands scheduled whereas now the current parks are being abandoned.
We can look at what has been added in the comcast era:
2012: Minions, Spiderman HD
2013: Transformers, Simpsons
2014: Diagon, HE
2015:
2016: Kong, Hulk Re-build
2017: Fallon, VB
2018: F&F
And these are the likely next few years:
2019: Potter Coaster
2020: Bourne
2021: JW land upgrade w/ new coaster
2022: VB Expansion (or something of similarly small scale)
2023: Fantastic Worlds
Its not the blockbuster years that some may have been hoping for, but its also not neglecting the parks. It's only a small drop in the pace of additions. There will still be plenty to drive attendance, and there is no reason to believe that there won't be more new rides shortly after FW opens as well.