Well, good thing your justifications have nothing to do with logic and baseball.
I like how you pick on Beltrans feilding and forget about Manny's, Fielding, Baserunning, Running (or not running) to first.
Damon's a better fielder and hits for better average and better OBP he's a leadoff hitter.
There about same in steals, which also factors on how a team uses them.
Beltran has better power which would help replace Manny's bat .
Then factor Glavine a decent pitcher, nothing what he once was, but a decent pitcher and the sox need SP depth and Glavine would help.
So, it would be a good deal, for those reasons.
That being said, haven't heard anything on that one in awhile, keep hearing the other 3-way deal, so I doubt this one is on the table.