Action groups have the discrete charme of being recyclable.
You invest the effort once and then you can re-use them again and again, just like a pre-configured solution.
If this is all about "I don't want to invest that effort", well ....
On the other hand: it is allowed (and actually encouraged) to post one's own solutions. So if you have the time, go ahead and use MP3tag's functions (which already there) to solve your issue - and then participate yet another time in the forum and publish it.
Somebody else already did: