Best way to speed things is get more support for the Creator. Monthly support allows them to spend more hours on the game or pay to farm out the grunt work. Cash inflow allows them to get better equipment to run renders faster.
I've seen some creators go from part time (just for kicks) to support enough to quit the day job and have weekly updates.
I totally get where you are coming from though. I have a 4-5 game rotation where I play to where I can, then save. Move my save to a special folder then uninstall. When I get an update alert I reinstall and move my save. Wash. Rinse. Repeat. :)