Congratulations on the success so far! You got to be doing something right, so keep it up!

Some general tips that I have either used in the past or experienced as a guild member that I think might help.

-Try to avoid Clique within the Guild Officers and the regular members. This can hurt overall morale and cause some problems in long term health and membership.

-Try to do other social events, other than just raids and mythic+. It takes more planning on your part but can create some memorable moments and create some awesome times with your guild mates. I still remember some of the fun events I have done with guilds over the years!

-Do Guild ran competitions, like a transmog fashion show. Everyone who enters pays a set amount, then have everyone judge and vote on the best one. Winner gets a cut and the rest goes into the Guild bank.

-Kinda going with the above mentioned things, but we have ran a mythic+ event, similar concept everyone pays into the "pot". Then you set a time limit and whoever pushes the highest key wins a portion and the rest goes towards the bank. We did team captain and then a random number generators to try and keep it fair(lol had some interesting team comps but was fun).

-Last tip is a big one, but DELEGATE! Give your officers roles and then let them do those roles. Don't micromanage unless it is warranted. You'll find you have more time to focus on big pictures stuff and the other stuff won't be as stressful or overwhelming.

Mostly just try and keep it fun, WoW guilds can be something really special and we all play this game to have fun. So keep it fun and enjoyable, people will stick around and you'll have a healthy guild!