Maybe you're right. Even though Spectre is a magical being and can steal magic, that doesn't automatically prevent him from stealing other types of powers. Even one so vast and limitless as the Power of the Guardians. Although from his conversation with Shazam, why would he say I can absorb magic? Why not just say power? Why would he refer to himself as a magical being rather than a powered being or a powerful being when he is talking to Shazam as he's draining him?
Regardless, the absence of direct evidence is something I've abhorred in kevdude's analyses. Although Spectre didn't say it was Hal's want for redemption that stopped him, apparently that's what kept Spectre from doing his job. Although Hal never even said or thought the word 'redemption' once throughout GL: Rebirth and the new ongoing series, that is what Hal kept fighting for throughout GL: Rebirth.
If anything, Spectre didn't absorb the Power of the Guardians from Hal during Zero Hour. That surely would have hurt him. But the facts remain, Ganthet said Spectre is nothing to him. Parallax repeats this assessment. Parallax also says Spectre is nothing to him. So there is direct evidence of my theory 'Ganthet w/ Power of Guardians > Spectre.' Kevdude's argument that 1) Ganthet is wrong 2) Parallax is mocking Ganthet and 3) Parallax is cocky just seem waaaay too stretched to be taken at face value.
I think your view is very suspect and I can't find any printed words throughout GL: Rebirth that directly confirm what you say. And in fact, there's a lot of printed words that contradict you! But apparently, I can't read them like that because you argue there's a different meaning to what is actually being said or thought. Go figure. How do I fight against that? "Those words in thought captions and in conversation bubbles don't really mean what they say." I had thought, that this shaky view and my solid presentation of the events would be enough to convince you. Apparently not. But feel free to renew the argument to crack my view. You don't have to limit yourself to the six premises anymore. Feel free to take a shot at something else.