Are monk at-will abilities less interesting than cantrips? Is punching (with a fist, sword, or nunchaku) less exciting than what a champion does?
Non-ki monk abilities very situational.
1. Deflect Missiles: Only useful when being attacked with ranged weapons.
2. Slow Fall: Only useful when falling.
3. Only at will ability is a Bonus Action second attack. It's like two-weapon fighting without requiring the fighting style. Starts at 1d4 damage plus Dex-modifier.
4. Fast movement: Allows you to get in trouble faster than the other PCs. You really don't want to engage in combat before them just like the old monk due to a lower AC and hit points.
Yep. Monk's at wills are much like a Champion Fighter absent the higher crit range, hit points, and AC with some situational abilities.