I wonder if Hall for Larsson affects "BPA vs. Need" drafting strategy? Edmonton drafted BPA for 8 years, amassed a bunch of skilled wingers, then traded the best of the bunch (by far) for a good but lesser player.
The clear problem is that saying "BPA, then trade" is that trading is based entirely on factors outside of the teams' control- ie the supply and demand of the market. Certainly, Edmonton (or so HF claims) would have liked a better guy than Adam Larsson, who has wavered between "good" and "adequate" in his career, but reports indicate that he was the best Edmonton could offer. I don't buy that Isle's report, if anything it was probably two or more lesser assets for Hall, and Edmonton went with the BPA. Really, by consistently taking the best guy available, Edmonton just shunted their "Need" draft down the line continuously, until they ended up doing it anyway.
I know you can't predict your team needs 2-3 years out, or when a draft pick can even start to have an impact, but by the same token, you can't predict the value of the player you draft. Case in point, if, for whatever reason, in 2-3 years the market value on LHD is very low, the 'Canes are absolutely screwed.
All that said, to be clear there were not really any forwards at 13 that impressed me, as a guy who vaguely follows prospects, to the point that I can confidently say "Him. The 'Canes should have taken Him".