[*]Barbarian Skills - were intentionally overbuffed for the simple reason that he was a very good character before and yet the least popular. So, similar to how a new dota hero is always op when introduced, we wanted to make sure that he gets played this time and we succeeded. Some of the skills will get slightly toned down in the future patch(es) until they are still good but not broken.
[*]Holy pala - actually all the holy skills are pretty good but I understand some people don't like enabling them every 6 seconds. The thing is if we remove this then we just get exactly the same build as UH caster but in a different skin. So while the duration is getting increased (more this time) in the next patch it will still be a feature of the build. I'm pretty sure that once someone makes a successful holy caster guide the spec will take off as it is rather underrated atm. Melee skills will get a further buff also. Overall both specs here were massively improved from the previous patch, there's no problem adjusting them further until people discover them.
In addition Suchabalance also confirmed in another post, that crystal of tears and some spell damage UMO's will be nerfed (probably by half) in next patch, as they were too strong.