Then it's not even expansion bias, it's strictly rate bias.
I addressed it on my reply previous to that already. If the only effect you see from high-rate immigrants is in the economy, I indeed believe you don't quite understand playing on low rates beyond "it takes longer." People didn't just get disheartened because the economy got screwed, but because they felt cheated out of all the effort they made to get where they were.
So you would personally vouch for, guarantee and put yourself as the target if they didn't go through, for hundreds of people. Quite bold, but hundreds still isn't enough to justify the development time, resources and everything involved. Regarding the transfers, Kaer was pretty clear when Lordaeron was just being put forward as an idea: it was going to be a server with a goal and with restrictions that would potentially turn off a lot of people, but it would be kept up even if the population was low like you describe. I guess you just dismiss that, despite the fact it was originally going to be a server only for Staff to gather and play in, but I have more faith in the goal of sticking to the principles Lordaeron was built on.
Yes, there are still certain bugs, which are being constantly fixed too. Certain things might be beyond fixing in a private server reality, but that isn't stopping us from trying, and I doubt anything that might remain will keep people from playing. I don't recall where it was said that there would be no bugs whatsoever in anything, so I can't comment on inaccuracy of that.