Ainge has always seemed to share the opinion of a lot of people here on the board, that Rondo was going to be a 40mpg guy in the playoffs, so it was a waste of a roster space to get a single-position guy to be a backup PG and the team was better off filling that spot with a combo guard. It's an attitude I have consistently disagreed with.
Later in the season, it seemed like Ainge wanted to tank and get into the draft, but the team just wouldn't give up. At this point, if KG and PP were gone, and Brandon Bass began the season as the starting center, with Melo and a rookie behind him as part of a strategy to tank, I wouldn't be shocked if this team screwed up Ainge's plan and willed itself into the playoffs.
Right now, the team has too much talent to easily tank for next season but not enough talent to look like a contender without some serious upgrades that may not be possible. That doesn't mean that the team is stuck in the middle, it just means that whether you want to reload or blow it up and rebuild, you're probably looking at 2014-2015 as when you are back to being a contender or back to having a decent chance at one of the top draft picks.