There is solutions but it just means actually learning the same process artists do to make them or game designers. You'll notice with a lot of older RPG maker games they had an image of someones face have it be blank, They would then switch around the eyes or add blushing. Or add details. This can easily be done with LIVE2d or other tools where you just render one character once, and change the face around to suit the subject. This would cut down on development time, and then you can do the big RENDERs of CGs. While also letting you focus on the big moments of renders instead of rendering each scene individually.
It would just mean learning these development processes that have been standard for the last twenty years to twenty five years. I mean no insult in that regard if you have not learned game development in college or studied it you will know about breakpoints and choke points when it comes to development processes, and learning which parts are the most time consuming to develop.
I know a famous project group on here for Hreinn games the reason they had so much trouble with their current project was burning the bridge with their artist and getting TOO many art stuff before actually finishing the game. Last Soverign I know has largely avoided this by a large array of gameplay. Or many of the other complicated projects on here. They have very solid base gameplay that lets people actually play the game while also having very relatively fewer CGs. Essentially a quality over quantity approach.
CG games might be stuck on the multiple scenes with various characters, which most artists IRL don't do because of how complicated they are to do.
