These are good point that would improve this religion somewhat indeed. I grand you that.
But it will not increase its ranks in my opinion.
Start from scratch and go back to Bible basics.
Probably come to something very close to may other religions
Make door-to-door optional for publishers and encourage people to talk about Jehovah when their HEART moves them to. Pioneers, elders and MS do the door-to-door.
This means less field service = less new ones.
Stop the guilt. This I think is the reason most people leave. I have NEVER felt commended and that I was doing enough even when pioneering and an MS.
It is also the reason, why most people stay, do what they do now. Why they attend meetings, why they do field service. No guild, would mean no field service, no placement of magazines, no money.
I do not think it would work.