It sounds like a creative solution to current day needs. The problem, as I see it in a nutshell, is accountability. To function properly I believe most public institutions need to be directly responsive to the people. Dispersing power and control too widely defeats this goal. Let's start with how these groups are managed.
Delegates are one step removed from the electoral process.
I'm not sure why this is so, but time and again in my experience appointed delegates entrusted to raise and spend public funds are less successful than those who are directly elected. Then let's look at how funds are raised and spent. A meeting is warned for comment on the proposed budget and town assessment. A few people show up. The budget and tax are approved.