No idea if he's been or not, but as someone who's been there, it's still easily the worst Disney/Universal Park in the world by a mile.
It's an okay add-on now for Disneyland Parc Paris, whereas before, I mean if you're already there you might as well, but it felt more like a poorly themed land with a handful of good rides.
Once Frozen Land rolls around, it'll be a solid add-on for a Disneyland Parc Paris visit, but it still won't be able to hold its own in a great way, but the steps they have taken are working, and I'm very excited about the park's future, yet I can't help but stress how badly it needs another land after Frozen partly because of how little theming there is in the park already paired with Frozen: Ever After being a weak ride.
WDW was underfunded for decades until the expansion period from Pandora to TRON, yet the Orlando parks still need more; those additions were more like catching up to a standard they should be at rather than purely expansion.
You have to remember that WDS was starting from a significantly worse position than WDW.
I mean though, unless you're visiting Disneyland Parc, which is absolutely stunning in a way no other "Castle Park" can compete (albeit in need of a major new E-ticket), there's also Europa Park, Efteling, and Phantasialand in Europe that are all significantly better than WDS, so there's no legitimate good reason anyone would go just for WDS even after Frozen opens.
I view that as a good gauge of how good a park really is. Secondary parks can top main parks all the time. Islands of Adventure easily tops Universal Studios; DisneySea obviously tops Tokyo Disneyland as well, EPCOT tops MK for me with its two new modern rides, etc.
WDS was like an even worse version of how abysmal California Adventure was to Disneyland before Cars Land. Cars Land will be far superior to Frozen Land, so WDS is improving, but I can't help but think it still is in DLP's massive shadow until they get another land on top of it all.
Disney should be held to their original plan. My guess is they get a Pandora land on the Galaxy's Edge plot if the current round of investment is successful.