I really liked DKS - easily the game I enjoyed the most that year but I am less warm about DC (imho the rts portion is very poor and not very much fun).
You're not the only one with shallow experience with DC. The review of Total Biscuit covers most of my impressions on it. The experience is all over the place. It is better if they focused on one portion at a time (create one RTS game, then create another to focus on RPG elements, then combine them all). Although, I liked the idea of experiencing being on a battlefield and at the same time commanding units, it is just not executed well/not engaging.
Anyhow, enough of DC rants, my expectations of D:OS is high. High due to:
1.) editor = like warcraft III frozen throne editor on how they are introducing it.
2.) Interactions to environment = you could interact with everything?
3.) Terrain advantages/disadvantages = I asked swen during twitch if terrain gives bonuses penalties, he said it does (IE height advantage gives bonus projectile damage etc). If someone made a strategy game from the editor, it is less redundant for them to script terrain bonuses/penalties.
4.) use of elements as a strategy
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I'm expecting a delay from the february 2014 though, but I'm happy that I could play the game even on alpha access. If you watched the stream on twitch, the schedules are not in it yet because they were having difficulties implementing it. There is a need to test it too.
Hope they could open up pre-orders soon so they could fund the game just in case there is a delay.