The batch file referred to is an automatic way to clear cache files before starting the game (or after quitting). It does the same thing that clearing them manually does, only it's more automatic. Some of these batch files also hit the two small files in DCCache and the downloadedsims.index, the FeaturedItems folder if you don't already have that deactivated, the Thumbnails and the WorldCaches. Personally I wouldn't bother with the Thumbnails and the WorldCaches unless there is a specific problem to be solved as routinely deleting those will make the game run harder/slower while they are being rebuilt.
I see that you are excluding the actively being played lot from the MC Reset Everythings. Have you ever MC reset it? That would be worth a try also. And are you running on an SSD or an HDD? If the latter, there's only so far you will be able to go with load/save time saving tricks before they won't really be effective any further.