Heat swords have a lower base damage than pretty much any other standard melee weapons, they seem to have a slightly faster swing and higher base charge damage, but other than that they're not very good.
I much prefer Cronus/Scindo over the DHS.
Also, I have North Wind but I don't think there's anyway I can give it to you currently.
It is not really hard at the beginning.
You can make your team and complete the missions with no problems.
The graphic quality and game art is not bad at all,
it is still something left, what makes an awesome game to boring in one week.
I believe the next update is adding trading. Is there any mod you're looking for in particular? I've got lots of shield/armor mods, which some people seem to have a fair bit of trouble getting. And I'm also happy to help if you want to farm blueprints/materials for stuff.