Regular lurkers suck ass against groups and even lone marines if they don’t land their pounce. No such case with vamp.
Vamp with tail jab is much, much safer and quicker. Raw damage applied is much, much safer and quicker to apply than trying to fling.
Regular lurker and warrior are better 1vs1, but vamp beats them against groups.
To do a fling in a way you mentioned, you gotta go behind a marine, either after a lunge, or normally, but you are so slow as a warrior that you take a huge risk to do it. Unlike vamp, who takes no more risk than engaging that one marine, while he protects you from other marine’s fire. Removing stun was a bit of a buff in that situation.
Raw damage beats gimmicks.
You don’t have to take out “dangerous” targets out of the fight, when you can escape every fight easly. As a warrior you sometimes choose your engagements, but your low speed and even lower speed when using lunge means often times it is marines who choose to fight you. No such case with vampire. You are always fast and have additional 4 tile teleport ability. Cooldown of which is just 6 seconds.
Stunning one guy is worthless when fighting a group. It is much, much better to not stun a guy and let him tank bullets meant for you.
Did you know that warrior, when first introduced, did not make marines lay on the ground with lunge, using them as shield? It was deemed OP. With flurry you sort of get this back.
Warrior is actually countered by slug. Vampire is not.
Thank you for your uneducated xenomain™ guess.