IMO the idea of being a healer/support/buffer/debuffer from the shadows sounds like an awesome concept.
Im also worried that seemingly all classes can do all roles. I love being a dedicated healer/buffer and the idea of removing the "trinity" of tank/healer/dps is a major concern for me. Wont there be a place for pure super-specialized min-maxed roles? SOunds like a major letdown. I cant believe this is looked upon as something positive. If everyone can do everything then the feeling of contributing something unique to a party is completely demolished -.-