I think at this point an argument can be made both ways.
The argument to blowing the team up is since 2008, we just haven't won a title. Now granted, fans are quick to mention injuries, crooked officiating (myself included, see 2010 finals), yada, yada.
But facts are facts. We are on a 5 year championship drought and though the Celts have been consistently competitive since 2008, they've just always come up short.
Last year was a prime example. The Celts had Miami right where they wanted them, heading into game 6. The Celts play that night was inexcusable as dominate as Lebron was. The Celtics from 2008 would've crush Miami last year in game 6. However, Pierce and KG are now 5 years older.
So hence, it's very hard to convince me we can win a title this year when we couldn't do it last year (or the year before, or the year before that.)
The argument for competing this year as (and I believe) if we can land one more big time player like Josh Smith next to KG and Pierce, that could be the difference maker to at least making ito the finals.
But the barometer should always be whether we can win a title, not just making it to the 2nd or 3rd round of the playoffs.