1&2: I have dmed for 3 groups, one group: warlock,  cleric,  swordmage (assault),  ranger, and  artificer. Another was warlock, fighter, rogue, paladin, mage, rogue. The third was paladin, warlord, wizard, rogue, fighter, ranger. 
3: I don't think any of the groups have fully 'gotten' the new...