I'm one of those who thinks the Steelers defense will be a lot worse without James Harrison. Worilds is touted as a replacement, but he gets banged up all the time. Staying healthy is a skill, and one that he does not seem to have.
If there was a way to restructure Harrison, I'd love to see it happen. Perhaps a pay cut this year in exchange for guaranteeing his salary and then adding on a third year to spread the hit of his restructured bonus, something along those lines.
After Harrison was not restructured last year, I feared that it was a precursor to his release this offseason (as there is less dead money). I fear that that is the most likely result, but I'm still holding out some optimism.