The are all primarily organizational, not engineering problems. Like many other tech companies, I feel that product managers at Unity are rewarded for launching

The are all primarily organizational, not engineering problems. Like many other tech companies, I feel that product managers at Unity are rewarded for launching new shiny features (that quickly fall apart outside the scope of beautiful demos), not maintaining and improving existing ones. But despite that, it still stays a very good choice for many different scenarios, and definetly the best for mobile 2d games. The original design choices are solid. The most important components are in good enough shape. And it stays just in the right place between being too complex and too primitive. So, from a business perspective, when you want to build your match3 or hyper casual title, there's no much of a choice in terms of engine.