Also played it for a bit, but quickly put it away after a few sessions, because:
Biggest problem: You barely even PLAY the game. You just have those units in your army, which you arrange at the beginning and that's it.
Most of the time, you won't give any commands to your units and the only thing you actually do every now and again is cast a spell - and even that only if your hero is a mage.
Combat is basically an idle game.
There are also issues with the UI. Despite playing for a few hours, I never figured out how to actually get the units onto the battlefield that I wanted there.
The game would always try to "balance" my non-reinforcement army in a way I did not want it to. The different ways of dragging/merging units seems to be HIGHLY erratic.
Eventually I gave up trying to fight the UI and just accepted whatever I was given prior to reinforcements.
No consistent campaign is a deal breaker for me as well.
It's essentially a skirmish-only game. Yeah, no, thanks.
The only thing you really do in this game is the Heroes-like overworld map.
And that plays in pretty much exactly the same way as Heroes does: You have one or two main armies and a bunch of smaller ones ferrying units around.
While you build up your castles in a way that prioritizes income first and then rush for highest-tier units.
It's not bad, but why play it when you can play the real deal instead? Especially with good
modern open source implementations?
I did like the looks and atmosphere of it, including music.
And I also like that low tier units are not totally useless, but serve as a somewhat important meat shield for your higher tier ones - this is actually an improvement over the real Heroes games.
But ultimately what's the point in a game that plays itself for the most part?