I think they ended up using Phaser. I left before they actually released a game with that new stack. As mentioned below the cons are that you will need to invest more in making your tooling and it’s way harder for anyone whose not a programmer to use it. The pros were that it was very easy to work with, HTML first, and had a long enough track record to have ironed out a lot of common developer problems.

I recall our unity engineer quite liked Defold, which had an integrated builder tool, but for some reason the lead dev didn’t want to go with it.

I don’t want to be throwing shade on Play Canvas though, it’s possible if we did the same assessment today we would have gone with that engine.