One thing that Pietrus showed me today is that he has the ability to come in and fill PP's shoes to some degree. Enough to make it worth trying to pick up some young talent or draft picks...
If you think Pietrus has the ability to come in and fill PP's shoes to an extent, I would love to see what players you would like to rebuild with.
Pietrus might possibly be able to come in and play for Ray if his ankle injury means multiple missed games, but he does not have the ability to create his own shot, or get to the hole, or draw fouls....anything like Pierce...I could go on for a while.
If there is one part of your post that I agree with, it is that Pierce's trade value should be capitalized on while he's hot.
Unfortunately his trade value is going to be at its highest if he carries this team like he did tonight, over the next 10-15 games before the trade deadline, and by that stage, we should have an idea of whether or not this team can compete on a playoff level.