I took advantage of the 100% XP boost over the weekend to get all 5 classes to level 60 in hard core and even managed to add on 11 Paragon levels. I sure do hope that RoS is gonna add 2 new slots for toons otherwise I'm gonna have to delete a max level character to create a Crusdader. That would really suck. Surely Blizzard won't do that to me.

What's new in RoS:
Crusader - Strength based Melee class
- Crusader specific weapons and sheilds.
- All new skills/runes
Act V - New Boss - Death.
- New Mobs
- New Areas
Level cap raised to 70 - New level 60-70 legendaries.
- New skills
- New Runes
- New Passives
Mystic - Enchanting. Replace one attribute on an item with another attribute.
- Requires materials and gold.
- Can only replace one attribute, once chosen cannot change any other attributes.
- Replacement attribute based on attribute to be changed.
- Transmogrify. Replace the look of an item with another that you have acquired.
Adventure Mode - Free movement around the map once campaign mode has been completed
- Each act has 5 Bounties.
- Bounties can be Bosses, Dungeons, Uniques etc.
- Blood shards drop from mobs which can be redeemed for items.
- Rift keys drop from mobs which can be used to open rifts.
- Cache rewards.
- Completing 5 bounties for an act increases rewards.
- Completing all 25 bounties for a game increases rewards.