Notice that i'm not 100% sure how xp works.
Shouldn't a Tiger with 100hp and 100xp value give the same xp than a Tiger with 200hp, x2 receive damage and 100xp value ?
While thinking again, they would also gain more xp from damage receive though.
I guess i'll should just ask how xp works in detail.
Veterancy is not related to the "xp kickers" you see come up when something dies, units gain veterancy from dealing and receiving damage.
XP in general counts towards command points
iirc