I'm not asking the devs to change anything.
10% of users [3 out of 30] uninstalling an app over a new feature seems like the sort of thing an app development team would want to know.
We are (or were--it's hard to win with 28 or 29 members) Top 20 and Tier 2 Guild.
My guess is GW is fine in the low brackets. Frankly, I'm grateful to be in Tier 3 (rewards are fixed) but I wish that it didn't have to come at the expense of fellow guildies' happiness.
We've also had people leave the guild for various reasons that may or may not have been GW, we just don't know and we don't know whether they quit the game.
Honestly I think the number might be higher than 3, I believe we've had turnover of 7, but we know 3 left due to GW.
I understand that people leave guilds ALL THE TIME in this game, but when you're a top guild, it's not like there's a lot of room above.
We are a casual guild, we never care how anybody does each week in GW and we don't care (per se) about seals or trophies. If you give gold, you're good.
So there's absolutely no pressure from the guild, any stress is between the game and the player.