I think on its face, it doesn’t sound that palatable, but there are some things to consider.
1. Dawkins is approaching the age where playing into shape becomes less and less viable. There aren’t a lot of fat old guys who are still playing at high level.
2. Spencer Brown’s contract status. Brown is younger and imo, more physically gifted than Dion, but obviously plays the less important position. If Brown plays as well as he did this year, imo he’s looking at top 5 RT money. I don’t think Beane and co can or even should pay BOTH guys. But I also don’t think Brown can play LT. Could be wrong, but that’s a lot of money to tie up in OT’s, and there’s only one guy who has a chance to play out a full 3 more years here.
3. Josh Allen’s scrambling. As important as LT is, imo the importance of the position decreases the more guys like Josh and Mahomes scramble. You see teams play patty cake with the tackles making sure they don’t lose contain. Most tackles in the NFL can consider that an easy pass block win. I don’t think the difference between the top 10 and bottom 10 LT’s in the NFL has ever been less than it is right now because of it.