Im sorry for possibly being difficult about this (and nothing against you at all William) but for the moment I still disagree with a lot of this.
-We need more input on the Legendarium World as it still does not make any sense that the worlds the stories take place in can just make themselves upon the book absorbing them. Literally NOTHING even implies that. It stands to make better sense to say Acheron created it as stated in both the Nick Dub and Italian Version, not just the time-space void. And creating the void from what I know is still a tier 2 feat. But again, we need to discuss this more. Furthermore, there is still no evidence that each story takes place in the same universe as again, if they were, that would mean they are all apart of each other which is wrong. The stories are totally separate from each other and if otherwise we would see characters like Rumpelstilskin or the zombie pirates go literally anywhere they want in the Legendarium World and not just be restricted to their own stories.
-Disagree with Possibly Low 2-C. For one, controlling a large signifigant part of its power would surely still be Tier 2 and the dragon flame still created the Magic Dimension fairly casually even if not instantly. In addition, we've established the Magic Dimension itself to not even be a single universe as realms like Domino, Solaria and Andros are separate from each other in their own realities, otherwise crossing dimensions through portals or teleportation wouldnt be neccesary to reach these worlds. So if that is taken seriously, there are multiple universes making this feat 2-C.
-Again, her not having the characteristics of the dragon shouldnt matter because the dragon flame can still be used in nothingess so its powerful energy alone should have Infinite/Immeasurablity in speed. Bloom draws power from said energy so there is no reason she cannot be given this rating. Same thing with the Ethereal Fairies and Arcadia. The dragon flame is literally the basis of all Blooms stats that make her....well.....above human level. She should scale above them in not just raw power but literally every stat. Also, I dont understand what the characteristics of the E Fairies has to do with this really. They are refered to being constructs of pure energy that can move outside time and space and its implied the dragon flames power created them anyway. Besides, even ignoring this, there are still more evidence of this. The Winx were able to move around freely in the Golden Kingdom, a dimension outside of space-time with no issues and Queen Morgana was able to roam around outside all existence when Nebula and the other earth fairies sent her there. In addition, IIRC, Valtor and the Ancestrial Witches were able to naturally roam around in the void of Nothingness that the G.D. was born in upon Valtors creation.
-The book absorbing magic isnt the complete reason why Acheron got trapped, again. This is particially true but its mainly because Acheron's power wasnt enough to control the book. He only ever performed this feat when being strengthend by the dragon flame.