I think that deal may not cut it (but if it's the best you can get, I'd take it), but you always build for next year when you are out. Unlike real baseball, we don't get two First Round picks if you lose a Free Agent (though that might be a cool league).
So, yes, if you don't get full value (remember the other team is hesitant to sell players low), trade for next year. Morneau is one of those who may be protectable, may not be; it may depend on how he does the rest of the year. And Stanton - it depends on league rules. If you can protect him at that price for the next 7 or 8 years, I'd jump all over it. For now, though, wait until teams become more desperate unless you get a good offer. But make the deal before the Trading Deadline.
Help with my protection quandary. The vote is now 7-7 between two options.viewtopic.php?t=433188