Maya, Lilith and eridium

Borderlands 2 Gameplay Discussion (Spoilers!)
#1

I really like the mystery/potential lore behind sirens, and I’ve been thinking: you remember how Tannis says there’s some connection between sirens, eridium and the vault, since Lilith got boosted by eridium, right? And people wondered why Maya doesn’t go all super saiyan too (at least not according to the lore - technically she does start throwing balls of slag after levelling up some on Pandora).
But what if Tannis is wrong? What if it’s ONLY Lilith who gets eridium powers? Maybe every siren is assigned a vault/planet, which comes equipped with a custom substance that augments their powers, and Maya just hasn’t found hers yet.
I still don’t know why a siren would get a vault, possibly they’re also defenders like the Guardians (albeit very elite, powerful ones), but unlike Guardians, they can assimilate into whatever race exists at the time, since siren powers are apparently passed on somehow? Maybe they get the extra powers in case of emergencies, like the vault opening?

Anyway, just my musings and stuff

#2

Angel got powers from eridium exposure on Pandora. I think it doesn’t really affect Maya because either she didn’t try to absorb it’s powers or she would need to spend more time with it.

#3

This is my take on it. Apart from the fact that it’s purely an artefact of the skill tree construction (i.e. a game mechanic not a story point), you could also take the time between getting phaselock (level 5) and being able to unlock slagging through either phaselock or scorn as an indication of progressive development of “eridium powers”.

#4

I always thought the reason why Maya can’t PL big enemies is due to her being weak and needing Eridium to boost her powers. (story wise. I do know gameplay wise that she can’t because it’d be game breaking)