That is a solid reason because I hated it. IWD2 was the best in this regard.
Actually no it isn't. Moving the mouse thousands of pixels does not fucking matter at all - it is the actual physical mouse movement on the mousepad in inches (or whatever measurement). Refer to my earlier post. The average PC user (probably including yourself) uses a high dpi mouse of 800-5600dpi because those are the standard dpi ranges today. Most mice come with a default of ~ 1600-1800 these days I think and you have to actually change them yourself upon use. Some newer mice remember your default DPI and save it to memory, others (such as the Logitech MX518) you always have to change to your preference if it is different from default.
The average PC user has a small mousepad. So a high DPI user with a small mousepad will not move their mouse very far at all to get from the bottom of the screen to the left (or right side). A movement of probably a few inches tops.
The average PC (and Mac user) uses Mouse Acceleration because it is turned on by default. You can't even turn it off on OSX without downloading a mod/app. Mouse accel moves the mouse slower on smaller movements (making very small movements more difficult) and faster on faster movements. So that makes it even less of a problem moving across the screen (I personally think mouse accel is absolute garbage and always disable it, but ymmv).
That is not uneconomical that is normal and there are games (FPS, RTS, MOBA etc etc etc) that require waaaaaaay more mouse movement than a 'laid back' RPG like an Infinity Engine style game will ever have, so saying anything about uneconomical mouse movement and using actual pixels as a reason is a poor example.
Josh Sawyer uses a Microsft Intellimouse Explorer v1.1a which has a DPI of ~440. I am not sure whether he uses mouse acceleration, but that is a slow mouse compared to most people (I also use 400 dpi) and people with 400 dpi mice are now probably in the 1%.
I use no mouse accel and 400 dpi, so movements on my mousepad would be large - but I am a low sensitivity gamer anyway and moving my mouse 10-15cm or more between objects on the screen is absolutely no problem for me.
I would have preferred a BG2 style round the screen UI because it makes better use of space, but they obviously prefer the bar across the bottom, which I don't mind, but it doesn't give you much room for big portraits - which IMO sucks balls.
Then right mouse button probably opens up like a context menu? I mean, how else would you want them to design it?
Exactly the same as the IE games. Right click and hold allows you to rotate the party transformation - very handy for navigating through corridors and such. Left click and hold for marquee select pls.
I know Josh likes marquee select, so that functionality will almost definitely be the same.
If the design is different for that I am going to be mad.