Any way to improve the circled areas so it blends better?

To my knowledge of trying for endless hours no there is not... however there is a inverted ramp for dirt to high dirt

isn't there mud or something you can use at the base of it to cover it up (like on jungle, where you can use high/normal jungle interchangeably)?

Just whack a big ol' sprite over that shit.

Lol i try to avoid sprites like there viruses... spirtes sure do help but i only use it when necessary.

Sprites also don't fix the vision problems.