Although a new lick of paint on the admin interface was probably overdue, I'm in the camp that feels the resulting design just doesn't hang together. Typography is dreadful, and clear 'bugs' (like what happened to the grouping of elements in left admin column?). I think they forgot that most users using WordPress aren't developers and just developed something 'pretty'.

I too have no time to worry about updating the admin UI as i want to focus on end site, but find it worrying that WP got it wrong, as many people feel, as this is the kind of thing that puts people off using a system.