Though I know the intent of this thread, I'll bite anyway...
I probably wouldn't have minded the Blige performance so much if she had chosen a different song. Lullaby of Broadway and What I Did For Love have been done to death and it would have been more appealing for me if they had both sang something that was a little less tired. I'm not a fan of R&B, but there is some stuff I like. Blige's performance just didn't do it for me. I found Pinken's performance, though vocally problematic, much more heartfelt and connected to the material than Blige.
"Reinvention is not exactly something Broadway singers know how to do as they have one style and by god they are gonna stick with it till that closing notice is put up."
Usually, it's because the song still has to remain in the context of the show. It's not the singer's choice to change the style of a score during the run of the show, but I'm sure you know that. Reinvention of the score for a show requires licensing agreements with the creators or the estates of the creators.
Personally, I would have preferred to hear Blige sing I Know Where I've Been from Hairspray as it is a great R&B ballad that has been seriously overlooked from television appearances. What I Did For Love was just tired, unimaginative and cliché.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian