I agree with what you just said, although I have a couple concerns.
1. Pugging any holes with anything permanent would be horrible if you ever needed to get to the window stuff.
2. The carpet foam is great, but holds moisture. I understant that the deadener material on the inside door panel should stop alot of moisture, but it would still be a major concern to me. Hense eD came out with
this When I did mine, I did as you said, layer the outside panel as much as I could, skipped the hole filler thing, pulled all wires from the panel then put down a layer of dynomat type deadener covering the entire inner panel. The Teklite just came out, so I'll eventually get that (once winter passes) to put on the inside of the plastic door panel and put a nice layer of
paintable deadener over the current tar stuff. I'd love to do under the carpet, but again, that'll be a spring/summer project.
~Eric