Let's be logical about this.

Why would SE take as much time as they plan to in order to transfer the game data if they didn't have to? What possible benefit would they gain from this? Especially since all eyes are on them right now to get this thing right since they fudged up so badly the first time.

I'm no programmer and I won't claim to have knowledge that I don't. However, I do use a little thing called common sense. SE wouldn't be doing what they are doing if they didn't have to do so. I'm sure they'd rather be continuing to bring in the monthly subscription revenues for as long as they possibly could.

So these arguments about sizes of databases and what actually goes into what they are doing are pretty irrelevant. At the end of the day all that matters is that the company is doing what it has to do.