Holy mages do have a potentially good match up against Golem Pit with Staff of Asyra and Divine Intervention. Intervention is especially good because if you cast it on yourself before the Transfusion comes down you can trigger it through the Nullify and the Jinx. Just poof away like the combo never happened.
The problem is that you probably still have to fight an attrition game against an Earth Wizard, and except for Brogan, you don't really have any creatures you want to use against Wizard's Tower or Iron Golem, unless you go for legendary Angels, and those are kinda vulnerable to Turn to Stone or similar control effects. And holy has no familiars, and freshly nerfed temples.
Nerfing the Temples really hurt, especially since they went overboard on it (IMO). Still, the Priestess can go toe to toe with an Earth Wizard fairly well, with the results coming down to who is the better player. Even if the Earth Wizard "switches" to the Hydras and Gorgons, they're still in good shape. Most Priestess decks I play against (and all the ones I build) have both Agony and Sacred Ground/Divine Protection in them which greatly mitigates the Hyrda's attacks (especially with a little armor). Obviously such cards can be removed, but you can say that about anything. And using the Gorgon against a Priestess isn't too scary thanks to her ability to remove the Weak counters. Add in all of the Daze/Stun effects and Divine Intervention and you have all of the tools you need to beat the Earth Wizard, it all just comes down to who outplays whom. Those games will go long though...
Earth Wizard is certainly tough, no doubt, but I don't think it's overpowered, just very strong. My opinion anyway.
Disclaimer: Please note that the above was just an opinion and in no way was meant to be aggressive, dismissive or insulting to any person or particular viewpoint.
Apparently I need to add that to every thread started by certain posters to avoid any misconceptions about my intent