Did the vastaya dictate too much lore?
Examples,
Swain is trying to become them, Ionia has tried to captured them, Zed tried to rob them, Rengar is one of them, Uydr's spirits come from them, and they acknowledge the existence of PARALLEL FUCKING UNIVERSES!
That's kind of alot seeing as how it takes away alot from other champions. It doesn't feel like their species exists because someone just had an amazing idea but because someone wanted a way to explain a dozen stories without actually talking about them.
Since League of Legends is focusing more on the legendary status of it's champions then why pull from their source of power and their unique origins? Why not let the champions be their own people with their own stories untied unless grouped with other champions? Ironman, Thor and The Hulk Were heros before they joined the Avengers not after to give an example. How fun do you think it would be if all the heros and villains power came from a singular source?
Imagine if Tony wasn't a genius but X power gave it to him. What if Thor wasn't a god but some guy that the same power just made SUPER SWOLE, What if The Hulk was the exact same thing but green and VERY VERY MAD! They were hero's with unique stories before, is what I'm getting at. They weren't attached to each other in anyway besides living on the same planet and Thor barely even does that.
Swain with this new context without the Vastaya is just some guy. Same with Uydr and Rengar. Having their story revolve around the Vastaya pulls these legends too close together. They should be separate enough and able to breathe without sucking in each others air. It's another reason people have issues with the prequel and sequel Star Stars series, it focuses still on a single aspect of the universe and that's Vader's power. It has the feeling of there being nothing else going on in the entire galaxy with the same applying here.
Let the champions be their own legends them pull them in. Don't pull a DC and just say these guys exist and clump them all together then scream "GIVE US MONEY!", tell a story or twelve.
Edit: there was a part I cut out because I felt the thread was getting too long. That was a mistake so I'm readding in this section to sort of explain what that previous part was.
In other series where there is a central power force, I.E Charka in Naruto or Ki in Dragon Ball the characters would still be stalwart heros with or without that power.
Where in this case Swain, Uydr and Rengar, would be nobodies without the Vastaya's power in the context of this new lore. Without the Vastaya, Swain wouldn't have the will to keep on commanding after is wounds. Uydr wouldn't even be where he is and Rengar wouldn't have his natural instincts allowing him to be such a great hunter.
Not only would none of them exist without this new power but they wouldn't even be the champions that they are.