The interior & exterior of the OT Falcon are irreconcilable. The exterior set was only 2/3rds big enough to hold the interior set overall. Even if you blow up the exterior to the interior's size (which they appear to have done for Ep#7) there are some things that still cannot be reconciled at any size.
I was kind of hoping they would come up with a new version of the Falcon where everything reconciles for the new trilogy. The changes required would be blasphemy around here, but the casual-to-medium SW fan would never notice. It's mostly just monkeying with how the hallways intersect the rooms inside.
Or if a fully matching interior/exterior proved too difficult, then maybe they could have split the difference and at least pushed things a few steps in that direction. Most of the public can remember the cockpit, the front main room, and maybe the smuggling compartments under the floors. The rest is just vague recollections of some curved hallways.
I really don't think it's that far off. It's visually believable, people building a full scale falcon will somehow make it fit. May be some modifications. But it will still look almost just like shown on film for the most part. You can nit and pick size of this or that. It's really not that irreconcilable with a few changes most people won't care about or notice anyway.