1.) Did you see that Death Magic Incarnate only targets units at low morale?
2.) Krell didn't spawn for me either. Saw in another thread that it is inconsistent and is being adressed.

Death magic is working fine, the spawn bug has been fixed as of last night's patch and should be backwards compatible.

-One bug that's been really annoying me is that any building/skill tree increase to wight king capacity and tomb prince capacity increase is not working. I have found no functioning way to increase capacity of either of those heroes beyond the starting 1.
-Also, non-TK factions do not properly receive their mounts from their skill trees (WK, vamp of shadows are the two I've tested, but suspect gunnery wight and fleet captains will have the same problems).

-There is inconsistency of recruit levels for horde vs settlement heroes. For example, I can recruit liche priests at level 9 from settlements, but my hordes can only recruit the same heroes at level 6.

All three of those bugs should be resolved with the latest patch

I didn't realize there had been a patch on Wednesday, my bad. The recruit rank inconsistency is still there, seems Arkhan's Liche Master skill only applies to liche priests recruited in settlements. Haven't recruited any VC heroes to test their mounts yet.

Thanks for the update - due to how those effects work, it gets complicated applying them to both horde and settlement lords. JvJ is going through and making sure everything applies to both, should be fixed next patch. Thank you!

The recharge of spells and warpstone amount UI disappears for some reason

Not sure if you know this or not or if anyone else said anything but for the Carrion Riders if there is even a single unit still on the ground they will refuse to listen to orders no matter what they are and will typically kill themselves because they'll always try and kill the enemies attacking that one unit on the ground still rather than run away or listen to any other order given, even sometimes completely canceling orders and flying in circles until the unit is either dead or back in the air. I've lost several close battles now because they just refuse to listen to me...its almost like dealing with rampage units but worse since you can give them orders they just completely choose to ignore them. I am not sure if it is just me but it feels like some of the general Vampire count units tend to do this also but not nearly as often nor blatantly,

Also had situations where I should have had my garrison come in to help one of my lords in the border but for some reason they do not come out to help resulting in that lords inevitable death...which has also costed me campaigns.

Outside of those issues I haven't really found much else thus far but I will continue to look out for things like this occurring more often as I both play more campaigns and do other things.

I should also mention that the Spirit Hosts have a click box so big that I cannot click on units they are around, so for instance I want my archers or horsemen to charge into a line where they are, if I want to do that I have to scroll as far in as possible and click on the unit that way, clicking on the flag and icon above it does not help nor do anything at all.