Pretty decorated maps are fine but I don't play jump maps to view the scenery. I am perfectly fine with maps that are just straight forward dev textured jumps. It makes it feel more like I am there to jump. I think that people will understand if a jump academy map designed for jump training is plain, square and blocky.
If you would rather have the map all pretty and curvy with more complex decorations then maybe more than 1 map could be made. Instead of 1 map including a rocket jump course, Wall jumping course, Pogo jumping course, Sync jumping course, Timed jump challenge, Endurance jump challenge, Precision jump challenge and Champion course, how about a map for training courses and a map for the endurance/precision jump challenges and the champion course? Maybe it could be split up into 3 - 4 maps?