I was at your point in my first guild, only we weren't yet able to clear haat, so no GK, no guild growth. was a good guild, just didn’t meet my desired play level anymore. Just state as much to guildmaster and find another through forums, I did, never looked back, found an awesome guild. My old guildmaster contacted me in-game through chat one on one and I explained why I left, all was very cordial and understood. Several dozen people contacted me about joining their guild after I posted my specific inventory info, etc., all great offers and went with one that seemed right. Go for it, you’ll find another guild that is good for you and is also a great group!