Hybrid or Multi-Class Support Roles

Had an idea for expansion hybrid support classes. They could be more advanced cards that are more difficult to play, but potentially more rewarding. So instead of filling out your support deck with 4 classes, you could exchange 2 standard classes for 1 hybrid class. So, take out the CLERIC and TANK classes and swap in a DRUID class. It could have cards that act as somewhere inbetween two other classes. You'd lose something because its not specialized, but maybe it excels in unexpected areas. Also, maybe it would be more challenging and rewarding to succeed with a smaller support deck tricked out with some funky classes. Paladins, Rogue Demon Hunters, Bards!