I always check the comments to see what issues the mod might have, judging for myself whether the people posting the comments have any idea what they're talking about. When comments and bug reports are disabled, I feel like I'm going in blind, and most likely I'll just skip the mod.
HOWEVER, considering how awful Nexus users can be and often are, I can't begrudge authors choosing to limit how they can be communicated with. I'd rather they not feel that they have to withdraw from Nexus entirely.
Sometimes the bad actions of others mean we can't have nice things, and that's just the way it is.