Part of that’s because movement is inherently punished by the game. The long corridors encourage you to sprint and slide, but doing that is punished if you take any damage. The cooldown of thrust encourages you to take advantage of it to the fullest, but by the same token punishes you if you actually encounter an enemy after having used it for movement. And not being able to shoot during some movement abilities does’t help, either.
Hopefully we can now get maps that promote movement. The majority of H5 maps give you the feeling that movement is a bad choice.
Good map design can help, but the constant tradeoffs with movement abilities have a significant negative effect. When so much of a map designer’s power to decide how a map should play is taken away, it takes a lot more effort and creativity to make it work.