I don't think a permanent move to end is going to help him at all; I think it will only highlight why he doesn't fit there in a 4-3. His only hope to remain on this team is to beat out other depth at DT. If he's ever used at end, I think it would be in situational short yardage packages where you want more bulk on the line in general.
This idea that the Rams drafted Carriker and then miscast him by moving him to DT instead of keeping him at DE is one of the more frustrating fan arguments I've seen in recent years. The guy came into the combine @ 296 pounds, if I recall. I'm not sure I saw one service or site that had him as a 4-3 end as a pro. The two biggest things that have stopped Carriker from being effective in this league are (1) injuries and (2) bouncing back and forth from NT to UT and not settling into the three-technique spot.