"Nothing in the universe can go Warp 10" - You know where it's from.
I know Brannon Braga wasn't a TOS fan, but someone should have told him that there's well over 10 episodes where the Enterprise goes over
warp 10. In "Wink of an Eye" they went to 14.4!!!!!!!
Hell, in the Filmation series they went 36!
P.S. I am aware of the change in the Warp scale, but my point still stands.
If you knew all this then you also know that Gene Roddenberry came up with the reformatted warp scale. Braga is not at fault here and the line makes sense in context of the new scale so I am not sure how your point stands at all?
Yet said new scale has never been alluded to in canon, and so-called "official" warp scales in the manuals have never ever matched whats in the shows anyway - according to "By Any Other Name", the old Enterprise would have made Voyager's "75 years at warp 9.975" journey in a month at warp 8.4.