DUELS obviously…
Priests:
They can play too many spells… too quickly its just a bit over the top and something needs tweaking there make it cost one mana or something
Druids:
Harvest time is utterly broken in so many ways especially with the spells druid has too go with it.
It just doesent even need discussing nor can I think of any way too balance it
Remove it and replace it with something else its horrendous, so much so infact whoevers idea Harvest time was needs sending for Psychological evaluation!
A 2 cost perm spell (Hero Power) that destroys any cheap cost crap minion and replaces it with 2 x 2-2 which can then be buffed Is just too powerful from start too finish of any match, Pair it with adorable infestation early game and you have 5/6 2x2 on your third turn WHAT??? then coin in too arbor up or play literaly anything else then arbor up GG!
Same power can be used too remove any enemy minion its a permenant remove that costs practically nothing I mean seriously?