So I just started messing around with this civ so here are my early impressions.

So far when playing as Hel my only problem is the peace music, Hel's theme, lasts far too long and it loops abruptly, I haven't been to war yet so I'm not aware if the war theme is the same. Also, even thou it says so, the Civ doesn't seem to work with Civ IV traits in Civ V or FE Leader Affinites. (if it does, then nether symbols doesn't show next to his name, I assume it doesn't as Hel starts pretty low compared to others according to score.)

This may just be a me problem, as have so many FE Civs and other mods running, there's bound to be a ton of conflicts. I haven't gone into any real testing with Hel yet, but so far he functions just fine with other FE Civs like Askr and Múspell.