> Seriously, I don't see the resistance to this, until a dev says its too hard to code. I won't pretend to know what it would take to add it, and I don't really think any of you should pretend that either.
I don't code much so I have no idea. I think there are a few obstacles.
1. It is more rewarding for us to work on a new game, which we do.
2. It is boring to make a change that is mainly UI. The results are unrewarding for us as devs

3. The change is big enough to introduce a new range of possibly severe bugs, meaning we would likely spend additional time (extremely boring time) and patches to find and squash bugs, while the MP community shouts 'exploit', 'my army disappeared', 'my game is ruined', etc. At this stage dom3 is working quite smoothly, without bugs. We are not particulary interested in introducing new ones. Therefore most new content is based on old mechanics or slight changes.
In short: we prefer a clunky, but working movement system, to spending unfun time to have an even longer unfun period of bugs, while we can't work on stuff we like and are good at.
It would probably be nice especially for the SP community, but the opportunity cost for our sake is unfortunately too high.