OK, so excuse me as I cut your post up into little pieces and reply to each piece separately, because there are things I agree with and some that I disagree with.
There will be more players.
Alright, that's good, right? Wrong. There will be more players, causing lag, the new empire itself with all of these new abilities will cause lag.
No, I don't think so. As I understand it, lag can be caused (or perceived, rather) mainly by two forms:
1) Takes a while for information to be sent/received between client and server
2) Lots of rendering and redraws affects framerate
Unless they go all Miccool on their animations and abilities, adding a new empire doesn't affect either of these.
Many of us can no longer play, like Fr0st.
This reason for this has never been made clear. Fr0st, why is this?
Also, they will have to reprogram many things like the replay codes.
Depending on how replay codes work, that may not be necessary.
More variety:
This also seems good at first glance. But everything will change. WyzDM may drop to 1200 rating for all we know. There is no predicting, new players may rise up. That being said, more variety may or may not be good.
Well, to be blunt, that's how games work: adapt or die. I won't speak for him, but I'm fairly certain that WyzDM would enjoy the variety/challenge in getting used to another empire.
Money:
This is a big issue. Some of us cannot let on to our parents that we are playing computer games(I've got strict parents and writing this right now is difficult while closing this every 17 seconds). So we can't pay.
While I don't feel like being a cheap-face, this is a true statement. People who can't pay have to stick with Order, so until I get the money, I'll stick with my swordwrath, thank you very much.
We will be disadvantaged and will lose in the first few weeks or so.
I don't know. We have to also consider that the people playing as the new empire will be unfamiliar with it, so we can't be certain of this yet.
All in all, I think it's a bad idea, not to mention the new bugs and other things that are coming. I actually think they should get all the Alpha testers to go to a website to test everything first, so bugs don't go all over.
I disagree. Try as you might, there will always be bugs. To keep a program in Alpha testing until there are "no bugs left" is to keep it in Alpha testing forever. They should release it when they think it's stable enough, like they always have.