It's nothing special.  Honestly I'm not sold on the subclass as a whole.  It seems super gimmicky and only somewhat useful. 

My initial thought of the Wild Soul Barbarian is, would leave a game that another player wanted to play it.  I feel the same way about Wild Magic sorcerers.  I understand that some players like that RNG stuff.  If a character blows themselves up, or turns themselves blue...I do not care.  When *I* have to worry about getting hit by their RNG suicide vests...no.  Just no.  But you can pos....NO.  But...NO.

When WOTC stops with the nonsense of screwing with your party because you are an RNG addict, then I will support stuff like this.  Until then.  NO.

Quote from badbovine >>

Hey all.

I was wondering what everyones thoughts on the UA Wild Soul Barbarian, and specifically, Magic Reserves (is it worth the action and the HP to give a spell caster back an unpredictable spell slot?)?

 Is it worth the action and the hp to give a spell caster back a spell slot?

In most cases, yes. 

Let's say I'm a Sorcerer. And I'm with a Wild Magic Barbarian. We go into combat and come out. I then sacrifice some spell points to make sure that I am missing exactly 1 spell slot of each level from 1-4. So no mater what number gets rolled, I am certain to get a spell slot back. And the Barbarian gets his HP back on the next short rest. Even in the most extreme example, the Barbarian takes 20 hp of damage and I get a 4th level spell slot. Yeah, no question here. I'd make that trade as either the Barb or the Sorcerer.

The Wild Magic Barbarian is a good implementation of a Magic Barbarian. My real only problem is that I'm sick of Magic Barbarians, Could really use a few more non-magic ones.