I would extend it to post season as well, but I get why they don't.
I think MVP needs to stop focusing on the flash and realizing that just because a QB is a needed position doesn't make them the most valuable year to year. For example: 2014 the most dominant unit in the NFL was our O-line, the player that took that unit over the top was Martin. I consider what Martin did that year far more valuable to the success of the overall team than a lot of those in the running. We already know how the line looked with only Smith and Frederick, it was a good but not great line. That's just one example.
Another would be Revis in 2009 - he was far more valuable of a player than Brees or Manning that year.