I realized after updating my game with Lost Tales and Echoes that I was actually missing the Frozen Fangs content. This content is only available through the Emperor Edition upgrade which kind of sucks because it's $12. The price doesn't make sense for such a small upgrade even with the Deep Freeze content for DotE. I bought the Deep Freeze content and think it was totally worth the $2.19(CAD). Now I think the Frozen Fangs content should be sold separately, but if it's not then no big loss seeing as it's only a single faction hero and minor faction. Also may as well ask what people think would be a fair price for this content.

I was in the same situation with you, but then a Steam Sale just popped up and I grabbed the add-on at ~75% off.

Yes, this DLC doesn't offer much "value for money", as it is meant to support Amplitude. So it's up to you

I see it at 7,59€ and I think it is kind of fair price. It includes the game soundtrack, a minor faction, a new hero and a spaceship and hero for DotE.

You can also wait for steam sales and buy it then.

The Emperor Upgrade is 66% off, or about $4 right now on Steam (CHF 3.74 to be precise).

So now would be a good time to grab it if you want ^^

The Emperor Edition is a little more expensive in order to be fair on those player who supported Endless Legend from the beginning - icarus is right though, it's on sale at the moment if you want to pick it up