We trust Dalglish. We don't trust Hodgson. Simple as that. That's why he isn't questioned as much.
I don't think it's just that. The way Dalglish turned us around and made us improve means people will give him leeway.
Objectively, though, when you already have CMs consisting of Gerrard, Lucas, Aquilani, Meireles with Spearing and Shelvey as backup purchasing Henderson and Adam for a combined fee of 23m pounds + player(s) seems pretty wasteful.
Dalglish must think they'll have a significant impact because going through all that for bench warmers appears a bit daft.