But you've got to remember the gate would have been connected to the power grid within the SGC so therefore there would be power flow to it allowing the inner ring to be unlocked.
Even though the gate was initially tied to the SGC grid, why would they leave it on if it was going to be decomissioned? Sure, power was on to the complex because lights, doors, and all that stuff needs to be working, but being a great power hug as a gate is, and it was not going to be used again, why would they leave it still operational? The wormholes take power from their origins, not their destinations, so it makes sense that an offworld activation would work without being tied to the SGC grid, but it wouldn't be operational the moment they tried to dial out, at least, if they were cautious and effectively cut power to the gate (if they didn't, well, end of discussion I guess).
About the thing in Unending, well, the Ori came there probably because they followed us or were being tipped off by the ascended. And surely they have drives capable of traveling between galaxies, so it would not be a problem.
The replicators were all eliminated... either when the AR weapon that O'Neil helped design hit all of them on their new settlement, and later on, with a satellite adapted network, or with the weapon on Dakara (that definitely eliminated them all). They were all eliminated since, well, I doubt that the human form replicators would travel with just a part of their bredering. And traveling with them all would make it easier to wipe them out of existence with just a single shot. The thing with Reece, I see it as totally diferent from the Atlantis replicators. It was an android designed from the start to mimic human reactions, while the Atlantis replicators started as single nanites and evolved themselves to become a more efficient working group, and even further, they were conceived as a weapon, not actually friendly androids. There's a lot of differences to actually directly associate on with the other. How they evolved from blocks to nanites? Those things were an artificial intelligence with lots of knowledge, that possibly allowed them to actually manufacture the human form replicators.
The societies all over the galaxy, well, that can be considered a plot hole if Ra was the only one god known to all of Earth during the activity of the gate and if Ra didn't have any predecessors that may have implemented isolated cultures different from Egyptian society.
And the language issue, well... that's more of a practical and technical problem than a plothole born out of bad scripting.
Ok, end of my post... long... :mrgreen:
