Do we not have enough of these fully featured game engines? Game development has become so bloated these days. You need teams of hundreds or even thousands of people to create a full game. In the PS1 era some of the best games were built by a team of a dozen or so people working for 1-2 years. Instead of focusing on graphical fidelity I think we should be focusing on lower development time, gameplay features/diversity, stability/portability and implementation. I have yet to see a proper open world game (Think GTA but you can enter every room in every building) with good draw distances that don't suffer from horrible pop in.
Also how about a game engine where it's easy to build games? The WC3/SC2 world editors are great examples, you can get started and start building stuff from the start. Even though it's an engine made for making RTS maps it's modifiable enough you can create FPS games in WC3 if your willing to put in the effort. https://www.youtube.com/watch?v=gwtteOIksbo
Also how about a game engine where it's easy to build games? The WC3/SC2 world editors are great examples, you can get started and start building stuff from the start. Even though it's an engine made for making RTS maps it's modifiable enough you can create FPS games in WC3 if your willing to put in the effort. https://www.youtube.com/watch?v=gwtteOIksbo