Slopes work well if you consider them just a air cushion, that a unit can stand on, but that have no effect whatsoever if noone stands there.
Then again, I haven't thought of the situation when a hindrance is upslope. Then it gets really weird. Many types of hindrace talks about same-level LOS. Does the grain dissapear if firer+target are both lvl0 but some grain is lvl0,75 to the firer only? I've played with them in several campaigns, but in this situation common sence is out the window. Rules must be checked and read carefully, slowing down play
But the bit about the slope TEM is really strange, and come into play very sparingly and sometimes almost by accident. That slope hexsides can give +1TEM, when you cannot lie on the "down" side of a crest and get any TEM (like in a gully), is a contradiction. Just game mechanics and chrome, but not a very interesting crome addition for me.
Janusz