Having a balanced party is important. And I feel Conan Exiles is lacking a bit in support classes. It is easy and to build your toon as a tank or a dps, but I have always enjoyed being a support class in most games I have played. Everyone loves the healer in the party.
That being said the healing arrow is a good step in this direction. But I have some suggestions. Increasing the level cap and adding another attribute would be nice to help with these. Maybe Intelligence?
The Bard: adding portable musical instruments and maybe some juggling balls and the dancing emote, these giving the PC the ability to act like the entertainer thrall. Maybe playing an instrument during battle adds a dmg and/or def buff. Feats required.
Combat Medic: so the healing arrow is a step towards this. How about healing orbs? Or being able to bandage up your team or thralls? How about being able to stabilize and revive a downed teammate, if you make it to them before the respawn timer is up with say 5 seconds to spare, with the appropriate item, you can bring them back with a small percentage of hp.
Hexxer: how about some de-buffs? Poison and Oil is a start but how about smoke bombs, flash bangs, caltrops, corruption orbs?
I know this a bit much, but I love this game and would very much like more options for character builds.