If we can add valuable information about a band and their music, but we have to sacrifice the 'concrete' status that releases used to have, I think MB's going to have to go there sooner or later anyway.
It makes life way harder for us but I guess I'd just like to see MB keeping an open mind moving forward (even if we don't need this yet).
As an aside, I also think this information is interesting regardless of if something gets funded or not. An artist discography that abruptly ends after a failed (and hidden in MB by default) kickstarter? Just throwing thoughts at the wall, but I wouldn't mind seeing that info in the timeline eventually...
edit: personally I'm fine with creating release groups for campaigns