Heh, agreed on Jug/Guardian.Really? Hmmm, went in with my assassin tank on normal mode, made it to the first six pull by myself(after you go through the gate). Figured heroic was a lot harder with how they were hitting the tank I was healing on my Sorcerer(although he was a Jug and they kind of suck at tanking large quantities of mobs, seem to be much better suited for taking one nasty mob).
The trash pulls may be beefier on hardmode, but the places you can actually wipe (turret fight, packed room with the screamers near the end, bonus boss), are about the same either way. Actually, the hardmode PUG I was with was in a hurry and skipped the bonus boss, so he may be somewhat stronger (already the hardest thing in the FP in normalmode) or have a tighter enrage.
End fight was easy either way.