The gil limit, while not removed, has already been upped by the way?
Okay? It's still superficial bloat you're fighting for. Without new players coming in, your count may drop, potentially taking away that self-appointed title of being the largest x guild in the world. I've yet to see you say how keeping the doors open on large servers will help new players. I mean, you already called our server 'toxic'.
I can understand with a FC of your size. However, you also mentioned the toxicity of your server. With half of your FC inactive, it sounds like your leadership and members really need to weigh your options as a whole and decide what is best. Especially with a new expansion right around the corner.
These servers have had limitations for quite some time now. Every FC on a high population server should be weighing their options for what is best. Gil and houses are temporary things that can be regained. High Pop servers will always have limitations adjusted to keep stability.
Like I noted in my other post- not particularly bothered with retention. Sounds like you just want to keep people coming in.
By the way, there's LGBT friendly FCs on pretty much every server my GF has created an alt on. So being "the biggest" isn't necessarily the best thing you can offer as opposed to actual QoL for your members.
Your transfers will be free, you get extra bonuses if your whole FC transfers, you'll be compensated for any houses you own in full, the gil transfer cap was increased, you get bonuses to exp gain up to level 60. You're being offered incentives you're just not bothering to actually read which isn't anyone's fault but your own.
You can also play the market. I have server transferred 2x, each time I created an alt on the target server and compared market prices. So I could on a conservative level gain all my gil back and even make more than I had buying the right things on my old server to sell on the new.
Honestly I don't think you have to work too hard. My friend moved from Gilgamesh to Balmung and lost gil in the markets. (Over 100mil etc down by a certain percentage I can't remember). I imagine it's the same for other worlds. I think you might gain or break even on gil easily.