Values from here: Talents and Their Mechanics Explained for All Classes
Veteran
- base_stamina 2
- regeneration_delay 1s
- regeneration_per_second 1 stamina
Zealot
- base_stamina 3
- regeneration_delay 0.75s
- regeneration_per_second 1.5 stamina
Psyker
- base_stamina 1
- regeneration_delay 0.5s
- regeneration_per_second 1 stamina
It’s veteran versatility. You can be great at anything you’re willing to sink points into. Two points give you the same regen delay as psykers but better base stamina. Zealots do still have better base stam and regen per second but they don’t have access to duck and dive.
I wasn’t exaggerating about stam regen during slides, it kicks in right at the end of the slide.
This does not take away from your original point about Vanguard. Interested to see the alternatives.