Underwater Imprint Souls definitely has a bug in it, but it has more to do with the commanding unit, Holy Deep One. The Holy Deep One (unit ID 1009) has a leadership rating of 25/0/0, which means that all the Mad Deep Ones will just stand there and die off without a magic leader. As such, Imprint Souls is worse than useless against sea provinces.
There is also a completely new bug introduced with the 2.12 patch: It is impossible to assign the full five stacks of units to commanders in the map file, because the fifth #units command simply gets ignored. Doesn't matter if the fifth command is #units x y or #bodyguards x y, the game just ignores it completely. I noticed this when testing a newer Version of my Faerun map. The problem did not exist in v2.11 (or if it did, I didn't notice it, but I really think it is new).
Also, a question regarding the Summon Animals spell: Is it intentional that only Giant Spiders, Great Lions, Black Hawks and Wolves are called with this spell? Moose, Great Bear and Boar would all be good candidates and would actually widen the selection and make the spell more useful andworth its high cost. I know Boar is most often the result of Polymorph, but it should be a Summon Animals option too.
And one final comment: The Garnet Amazon holy unit, Gryphon Rider has to be changed. Right now it costs 125 gold, 25 resources and it's very fragile. Yes, itturns into a gryphon when the rider gets killed, but after the battle ends, the gryphon dies (unlike in Dom-PPP where it stuck around like the Machakan Hunter Spiders do in Dom2). This makes it a completely worthless investment and quite frankly the worst sacred unit in the game bar none. It ought to be changed back to the previous status, or the cost significantly reduced.
Other unit editing that should be done are:
Lord Guardian: no castle defense bonus while regular Guardians have def(+2), what gives?
Demonbred (121): Unit should have base undead leadership of 25 like the regular demonbred (87), that gets lost when you turn an 87 into a prophet, and it changes to 121.
Captain (293): The unit graphic is a horseman and it has cavalry weapons (lance and hoof), but the unit is infantry, complete with foot slot for items. This makes some of the mercenary companies seem rather ridiculous. Was the #mounted command or whatever it is that makes units a horseman forgotten from this unit?
That should be about the size of what I want to say this time. Absolutely great game, which is why I'm bothering to list this stuff.
Best regards
Edi