The OLD one was better (which I think was mostly server side rendering) is still better than the new one that you're basically forced to use.
It really says something that when you complain about it, the only good response is "well you're not supposed to use it, you're supposed to use something else like terraform or the API (don't get me started) or ansible".
I REALLY hope this means they are dumping it for another rebuild, and the open sourcing is a fig leaf to the people that worked hard on the current redesign.