While moving from 40 to 25 man raids will have a number of complications... I can't wait. As a raid leader I rely on my CLs (class leads) to keep people performing, but frankly the tendency is to coast (which we highly discourage).
We're a group where a lot of us like the idea of doing speed runs on easy content... unfortunately with 40 people it's way too easy to let people slip through the cracks... sometimes casting half the spells as a similarly spec'd class member or swinging half as much with the same speed weapon.
With 25, I would imagine it'll be as easy as 20 man content in figuring out where the weak link is. Try to fix it, if it doesn't work toss 'em out and get a new one.
As a side note I also love the idea of earning honor points and spending them...