If you are already doing things that other brothers don't want to do, then you are slaving for them unnecessarily. You are dependable enough that you have given them a great chunk of your freedom and you are not taking it back by waiting to get removed or spending several more years doing your fade with little progress.
You really need to bite the bullet and move on with your fade. Will it be noticed? Will some alarms go off? Sure. You know what happens a few months after the alarms went off? You've had a break from your assignments and people tend to forget all the fuss from a few months ago. Putting it off doesn't change that. The only reason to put it off is to leave all at once down the road, say to another congregation or just walking away from attending meetings.
Here's some "bite the bullet" methods:
1. Go to another congregation. Could be foreign language or not. When you get there, turn in 1 hour of field recruiting every month or even be daring to say "I have none this month." They probably won't ask you to be an MS. Even if they do, say "No, I feel really bad about my hours and so much is going on with me. No thanks."
2. Develop depression. Still turn in 1 hour every month or even Zero for a couple of months (as in 2 or 3 months only, let's not drag it out). When asked about your situation, or when you get up the nerve to speak to an elder, you say "I have been depressed (about TTATT) and I have seen a doctor (on television if not in person) and am on medication (even vitamins or breath mints are 'medication'). I just find it so difficult to motivate myself. It has been suggested that I remove as many responsibilities as I can. I need to resign as an MS." Don't take any compromise such as "Why don't we just cut back" or "Let's just keep you as an MS and remove responsibilities until you are better."
3. Simply resign and offer little reason. "Brother, I have some personal issues I don't wish to discuss and I wish to be removed as an MS and from the school."
Whichever way you go, you can be free of responsibilities at the Hall. You can quit the Ministry School at the same time with the depression method or you can refuse to enroll with the moving method. It's a bit much to offer no explanation the third way and also quit the school, so it would normally wait a few more months. People will soon forget that you were an MS.