I agree Will is a better player than Boogie. Most people would think the same way which made it smart to align with Will.
In Week One we heard Boogie explain to Shane the importance of keeping a big target in the House and close to you. The longer they stay in the House, the more weeks you can use them as a "bulletproof vest" for yourself. In BB All-Stars with a F4 alliance of Will, Janelle, Boogie, and Erika (that was the name of the skank you forgot) Boogie had not one but TWO bigger targets close to him (i.e. Will and Janelle)...a factor that contributed to his win.
But just because Will was a better social HG, it doesn't mean that Boogie was not a solid player. I'm going from memory but I believe he won 4 or 5 competitions that season AND he won the coup d'etet by correctly solving the phrase, "You reap what you sow" allowing Boogie and his alliance to hold considerable power for a three-week period. Based on these facts I would say Boogie MORE than pulled his weight in the Chilltown alliance enroute to his BB All-Star victory.
On a final note...if you HONESTLY believe Will did not want to win BB All-Stars, I have a bridge about 20 miles from my home (Brooklyn, NY) I'd like to sell you!