Shroomy
Adventurer
The drawback of course is that we still need to buy supplements, so from a financial perspective, it didn't really change for me (but it might have for others, who didn't use to bother with supplements since the core rules contained their Druids and Frost Giants.)
Technically, you don't even have to buy the supplements anymore, as the DDI Compendium would also be updated with the new rules content by what, the 4th Tuesday of the month (I can't remember the exact details anymore).