Instead of changing the amount of points earned dependent on what class is playing what, why not make a generally more detailed ranking system?
While it may be up to subjective classifications, maps could be rated as "technical," "simple," "endurance," and etc. These classifications could act as multipliers on top of preexisting completion points, allowing for the difficulty of a map to be rated beyond just the 6 tiers. You could obviously expand from these classifications quite a bit, and I'm not sure how you would weight things, but I believe that it can be done.
I agree with a lot of the original post. I also believe that Tempus should have a surf style system for rewarding points based on time. Overall good points made all around.
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Examples:
Technical:
jump_lanc:
Next to no wallpogo, uses more niche skills like bounces, wallbugs, and technical pogo
Endurance:
jump_storm
Generally consists of long wallpogo, most of which isn't technical.
Simple:
jump_elephant, jump_rush, etc.
Fast, t1 - t3 jumps that require no technical skills.