I highly recommend turning off the hex grid to better read hill heights.
I have the hex grid OFF about 97% of the time. It took a battle or two to get used to, but I'm able to move accurately and recognise terrain more easily, I'll never go back. I only turn on the hex grid (hot key: .(dot)) a couple of times per battle to briefly check the range to suspected enemy positions.
As for buildings, I'm not sure. IRL maps don't reveal building height, and if you have LOS to the building you can at least right click and get an idea of what it obscures. I'm fine with the current situation where buildings/visibilty is a bit foggy. The more of your units that can see a building (from different vantage points) the better picture you build up of the lay of the land.
How about maps that are mostly obscured (blacked out) until you get units with los into those hexes? Now that would be an excellent Realism Button in the Preference Screen.
Scouting will become even more important.
Cross