they're most likely not building games and engine at the same time and haven't been since Sword and Shield. this iteration of their tools date back to Pokemon Legends, so they're probably not concurrentBut ultimately what they needed, and what they need, is TIME. Time to have more than one draft, time to optimise, time to implement. They've spoken to trying to improve quality while maintaining release cadence and that makes me uneasy, because I don't think those are possible at the same time. Something has to give, no matter how much next generation hardware smooths things over, some things just can't be fixed with MORE technology.
also it seems like the engine's name is Trinity according to the credits of the DLC. I'm far from that point though