It was a Elf Vampire who actually finished Elizabeth's research. A year after she got entombed, a Researcher hired by the Sect of Forrus was tasked in finishing this research to prevent the Vampires from becoming desperate again and another Royal to take the helm and do something more worse than her.
Though the Alliance of the Free Peoples did make sure to put Vampires who had been able to move on from her to be put in place, they know that since they are immortal, it would be nearly impossible for them to forget of the Golden Age of Blood before, thus putting Elizabeth's long tired plan into motion again, but this time with the help of everyone. Soon, a method was made and invented, though it was a long drawn process which needed alot of effort to pull off.
In the end, a new generation of Vampires, without personal experience of the age before the current one was born and there parents, slowly accepting that there time is over. Alana, Morgana, Don, Percival, and more are part of these new ones and with her having a 100% blood purity, she is the 2nd in the Kingdom to achieve this milestone. The first being from the first generation which was Morgana's.