COE4 looks interesting, to be honest I've never even heard of the game before, care to give a mini review?
I've bought it and got to play a few hours and I'm really liking it. It's very similar to CoE4, but with some great improvements.
It's basically a very lightweight 4X game, with almost no micro management. There's no diplomacy, no tech tree and you have no influence on the actions or positions of your units during combat, it's all automated.
However, what the game lacks in complex game mechanics, it makes up for in sheer content. There's 20 different classes, all with their own play style, 60 magic disciplines, over 1000 different kinds of monsters and over 300 kinds of rituals.
All of this means that most of the game you can focus completely on discovery, both in the sense of exploring the world map (which has the main world and 6 other planes) and also all the different classes, spells, rituals, monsters, random events, magic items and unique locations.
One point to mention though: be prepared to lose some games because a group of deer decided to trample through your capital on the third turn, or because your last commander happened to run into a group of stealthed units while going through a forest or because you started near a bunch of monster lairs your class can't get rid off and can't manage to hold onto any resource tiles (that last one is why I abandoned my last game).
All in all, I would rate it 8.5/10, can definitely recommend, especially since it's not even 10 bucks on Steam at the moment.