I finally did a bit of exploring to get to the Enthusiastic Soul in Maldraxxus. If you want a location, the Wowhead page is here for them:
I found where the Saurok spirit is, and found a few other Enthusiastic Souls in the area of NPC races (Saberon, Arakkoa, Quillboar). I didnât see many others in the area, those according to Wowhead, it seems like there are a few others like Mantid and some playable race spirits.
So what does the Enthusiastic Soul look like? Something like this:
As you can see, they con friendly to me (green). The others in the area I saw were green as well. No faction appears tied to them when you mouse-over them.
The area also has some Curious Soul NPCâs, who look like a generic ghost-like form. They also were friendly (green) to me and had the Undying Army rep attached to them, which is the Maldraxxus covenant rep. Here is the Wowhead page for them:
https://www.wowhead.com/npc=172413/curious-soul
As it turns out, the Saurok spirit in particular had a friendly conversation with some nearby Curious Souls:
Enthusiastic Soul: I think theyâre making a construct.
Curious Soul 1: Perhaps a construct for meâŚ
Curious Soul 1: The greatest warrior Coldridge Valley had ever seen!
Curious Soul 1: Who single handedly repelled the trogg onslaught of the Anvilmar!
Curious Soul 2: There is no construct that could possibly hold all your incessant babbling!
Itâs very possible that this Curious Soul in particular is a Dwarf or another Alliance race member who spent time in the Dwarf area. More than likely, a Dwarf spirit since that area, I believe, is the starting area for Dwarves (also Gnomes during Classic).
I also took one more image to try to get a better look at this Saurok spirit:
If you look closely, youâll see me and my two pets in the background. The Saurok was in front of an elevated platform near the edge, so I had to be creative to take this screenshot.
There wasnât much I could do with the Enthusiastic Soul. I couldnât talk to them, they didnât respond to any emotes I did, and they werenât interactable in anyway that I could figure out. The area was surrounded by enemies wanting to beat me up, but these spirits donât seem to be on their side.
Judging from the conversation text and the area they reside in, it sounds like that theyâre there to get construct bodies to get into and serve the Necrolord covenant in some fashion.
If there is a regular quest, world quest, or covenant campaign quest involving them, I have yet to see it. I didnât see anything involving them in the Necrolord covenant campaign storyline, unless I missed it somehow. Iâll leave it here in case anyone notices anything:
https://www.wowhead.com/guides/necrolords-covenant-campaign-story-rewards
Itâs possible theyâre there just for flavor andâŚhmmâŚI was going to say world building, but I guess afterlife building might be more fitting.
Still, the fact that a Saurok can have a friendly conversation with another being of a different race is something significant. Especially considering that, if Iâm correct, they would be working together to protect the Shadowlands. Itâs a great find to be sure, and while it may not be a hint of playable Horde Saurok in the near future, itâs still pretty cool to see them show up a few times in expansions recently. A part of me does hope weâll see some Horde-friendly Saurok in the near future, of course. 
Needless to say, Iâll keep an eye on this Enthusiastic Soul and see if anything else involves them. Iâve been thinking of working on a Necrolords character in case something of interest pops up for them, though Iâve been mostly wanting to do alts after I unlock flying.
If anyone discovers anything Saurok related in this expansion, please share! Iâll be sure to keep my eyes out for anything else of interest.
More Saurok research to continue in the future! 
