About the ramps, I understand what you say, the diagonal ramps have that effect, they have some sharp. In another map, I have the same thing and I put hand to smoth it, but then a friend of mine spoted me : "You got broken ramps. They're not actually broken, but looks quite weird and unnatural. You can use height to make them look natural."
What happened in the end is I worked that much, that the ramps werent ramps anymore and ended too smoth with the lower terrain, the height variation was lost. So I undone everything.
Even if they don´t look that smoth, I am not fan in puting hand in the ramps if you understand my point, and let say is blizzard fault that diagonal ramps look sharp. Actually I tend to use sharp terrain (grass) like Blizzard does.
But yes this matter is one of the matters that are in my mind and if I don´t do something about it is because I lack the skill / experience and I don´t want it to make it worse.
height variation never was my best skill, so I use it carefully / avoid it, and try to compensate with my others skills such as mixing tiles and micro doodads decoration.
Thanks for the feedback mate, see ya