I wanted to revive this thread adding some additional notes:
1: Wheels are too slow. the S2 and XL3 I can accept if they were kept slow but the rest of the wheels (M1, TR-2L, and TR4) can probably use double of their Drive Limiter value (200%) at least.
2: Climbing slopes needs to be improved. Currently I can climb 20 degree slopes at best. I'd like to request to have that number doubled (40 degrees). There are several things that we have access to in the Parts Manager to help but these max values we can adjust up to is insufficient or just aren't helping. The Drive Limiter (what manages the rover's speed or torque or w/e) is the most helpful parameter to climb with when at full 100% thus needs to probably be doubled.
3: Collision mesh is like the wheels are sitting on a thin plane circle so the rest of the wheels are just clipping in the ground, please make the collision mesh match the shape of the wheels or by minimum give them a cylinder shape?
4: Kerbals are OP when running into wheels...
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Also something I wanted to comment greatly about is the wheel steering orientation has been great from my experience. It amazed me that wherever I placed the wheels on a craft it would know which way it should steer and also when docking with another rover the wheels would once again switch settings and knew which way to steer automatically, something that has greatly improved over the original KSP so good job to whoever did that!