[FEATURE REQUEST] A clean way to use certain Action types with multiple fields and/or a way to use _TAG with exceptions

Like the users that started these threads,

I was looking for a clean way to run Grammartron on every field, except the media, comment, wwwartist, genre, and custom fields. There were some workarounds offered in the threads above but I'd prefer a clean way to accomplish this.

An "Exceptions" field that pops up whenever you use _TAG, or a way to use multiple fields with Actions (that require one) would be clean enough for me.