Short of getting Cousins in a steal of a trade for something like Sully and Green, I don't think we're going to be able to put together a team that is capable of beating the Heat this year without real injuries to the Miami boys.
However, I like our 4 good starters a lot - Rondo, Pierce, KG & Bradley - and I think our bench is actually coming along nicely.
In order for us to compete, I think we need to:
1.) Keep those 4 on the team
2.) Try just hard enough to get into the playoffs
3.) Move KG to Center for the last few weeks of the season and the duration of the playoffs, but keep him at PF for now to save his knees
4.) Hope for a few injuries like Rose & Bosh
I honestly think the Celtics can match up with the Clippers, Knicks and Thunder in a playoff series if the Celtics are healthy. Otherwise, why blow up the team if we're not going to win anyways and it would mean giving up one or more of Rondo/Bradley/Sully when those three should be affordable, legit starters for years to come? I know you should always try to go for the championship if you can make it, but at the same time, let's not give away great pieces out of panic.