I agree there always are trade-offs.
However, what I meant is that it's easier to turn a coop game, especially one like DOS which a turn-based cRPG, to a SP experience. I'm not fully aware of the Arena yet as I missed most of the streams, but I seem to remember reading somewhere the Arena in SP would essentially be a kind of stand your ground against NPCs rather than players fighting each others. As for the rewards, I'm clueless, but if it's just a title "master of the arena", I can assure you I won't step in it, neither in SP nor in MP. With the correct motivation though I just might !
The opposite isn't as true, I believe. Players in MP could find all sorts of exploit that wouldn't be possible in SP. Building your game on a SP foundation and trying to add a working MP seems like more work than the reverse, is all, and most MP content can work well in SP too.
Don't worry, I didn't say nor implied you'd hate a turnbased D3. I totally understand the need to change things and go back to RT once in a while. It's refreshing.
I just thought it would be fun to 'merge' both series like SoulReaver did. Could work. After all, they are mostly the same story with the same overall background. However, SR and Legacy of Kain had a very similar gameplay so it was easier to pull of.
