It sounds like you should change course because in your heart, you've already made up your mind. If you're longing for rewards enough to want to take a sabbatical to join another FS, then you're not a right fit for your own FS.
Honestly, after you've tasted more rewards with a more competitive FS, do you really think you'd want to go back to less rewards for the same effort? Which then begs the question, are you playing this game for you or the other people in your fellowship? From your other posts, it doesn't sound like the wrangling of 24 other players is your first love about the game and why you are playing. Some people
need to be the Archmage because they just want to be the boss, but you don't fit that profile. And now you're going to hold yourself back to appease other people's playing styles. A better option that benefits everyone would be to play with 24 other people that want to play like you do and don't want to hold you back! If you want to be an Archmage, then keep the Archmage hat. If you don't, then go join an existing competitive FS. If your existing group wants to stay casual, then it's probably not going to fall apart if someone takes over. There isn't much administrative overhead needed to allow everyone to be chill. And if you're afraid of burnout in the future, well it's waaaaay easier to throttle down from competitive to casual.