Don't you mean two realities?That's our job as tie-in writers, to treat it all as one cohesive reality.
Has it been established in any novels yet where and when Scotty created transwarp beaming? (Perhaps in SCE, post-"Relics"?) That's something else that leads me to believe it's not the same as subspace beaming. They'd already done it in TNG, but Scotty is credited as the inventor. You'd have thought they'd at least mention that.You may not "need" to "shoehorn" anything in, but I and my fellow tie-in writers do need to reconcile it all as much as we can. And since this is a thread about the impact of transwarp beaming on ST novels, well, there you go.
SCE stopped publishing years ago, and the film's new. They couldnd't establish it because it was made up for the film...