I think this is the biggest hole in the Ronnie Raymond theory is how does Raymond know about Team Flash?
Savitar has knowledge of all that, which means his knowledge either spans across worlds, or perhaps he’s an omniscient entity aware of specifically everything involving Team Flash.
Ronnie disappeared in the first episode of Season 2 of the show, and before that only spent a limited time with the members of The Flash.
Ronnie’s knowledge of the team prior to entering the singularity would’ve excluded Wally West, Cisco’s super powers, Earth 2 Wells and HR, Jesse Quick, and so on.