Have they considered delaying it to 2020 encase if issues arise with testing?
Honestly, it's more of an issue to where WDW could've started at a similar time to Anaheims version, as it would've allowed them to easily ensure that both can be worked on at the same time, to address the issues of their other versions at the same time.
I am betting this gets delayed to early 2020, as it really doesn't look anywhere near completed.