That reminds me of a few vocalists who undergo training with their singing (Matt Heafy of Trivium springs to mind- amazing clean vocals found on Shogun), and i say it can only be a good thing Ander's undergoing some improvement. Don't get me wrong i'm a fan of his singing and screaming, but the clean, spoken-word-style vocals he does now and again (Satellites and Astronauts, The Chosen Pessimist, other slower songs) are really grating on my ears- i can't stand it!
And i was suprised by the lack of clean singing during ASOP- where CC would have had a clean, sung chorus from Anders, ASOP had screaming and singing dubbed over oneanother, which drowns out the 'weaker' singing (making it ultimately sound like backing vox). I consider the only true singing on ASOP to be Alias' chorus.
I look forward to Anders' new and improved approach to vocals, and how much of a balance between singing/screaming there will be on the new record. I think Anders has a talent that he can build from.