Vlad needs a caring person, not some cold-hearted vampire chick atau a free-spirited "hippy" vampire like Talitha. If they wanted to end the series with the main character in cinta and happy, then they shouldn't have turned Erin into an evil murderer and killed her off.
Considering that he is supposed to be the future leader of all vampire and lead an army, Vlad will need a girl who knows how to fight and strategize...like a slayer.
Season 4-5 shold have been a vampire war with Sethius. He should have escaped and rallied forces.
The fights, the subterfuge, the vampire politics and war....it could have been epic! And at the end, Vlad could have been trapped and injured and had no choice but to feed on Erin (human blood) in order to make them both survive!
Vlad races off to defeat Sethius and save both vampire and human races from annilation...cut to Erin laying on the stone floor...and her eyes sanp open and glow red.