The following is found in the Dragonstorm Free Play Mode.

First off is the quest to save a bunch of freetraders, by leading them to the portal in various maps.
The counter went to 20/20 but did NOT trigger completion.
If you read down below it, it says it needs 25 in the mission text, but the counter won't go above 20, no matter how many you bring to the portal.
This quest cannot be completed!

Second is the map of Gillyshire, which CONSTANTLY spawns hostile skeletons in my base, no matter where on the map my base is.
I'm not sure if it needs to be said, but this makes it IMPOSSIBLE to establish a base due to the constant combat!
GRRRRR!

Thats the only two bugs I've found in freeplay.
Of course, I didn't get very far with that mainquest stopping bug above.

Do the devs read this forum?

I don't think so. They have their official spellforce forums.
Though some community moderators from nordic are in fact checking this and the steam forums every now and then.
Although I have seen them more often in the steam forums.