I agree, Wildlings feel great, maybe my favorite class overall.
The shield change was interesting, very distinct, makes them unusable for absorbing arrows, which I really like actually. There should probably be more specialist melee shields around tbh.
The only quibble I have with their current perk loadout are really just problems with Captain mode in general:
-Axes don't really affect shields enough to make the choice worth considering, even against Targes and Recruit shields you will not see them break in a melee.
-Stronger Javelins perk is not good enough to really be worth considering. Throwing spear has a similar damage output potential with default javs, plus the ability to one shot enemies quickly and be used to fend off cavalry.
-Having Throwing Spear + Javs as a standard loadout for skirmishers causes problems. I can't tell them which one to throw first, they seem to decide based on range, so if I am protecting archers with my spears it means I cannot throw missiles at all.
All that said, they feel great. A good flanking and support infantry for your Clans or Oaths, can be used to engage the enemy first so savages can flank, and can pull double duty as rearguard for archers. Feels like what the Brigands want to be.