Tristan, Taylor highlights the practical issues of sharing the decisions. Do you really want the other people helping to run things or are you only letting them have a say so you can try and avoid the SEC regulations?
Second, if you are trying to avoid the SEC regulations, be very careful that in the heat of the moment, you do not make a short term decision which flips you from being 'safe' to over the line.
Amy is specialist who is SEC and tech aware. In other words, if she feels it is a securities offering, highly likely she is correct. Lawyers who are not SEC aware can easily not realize that they are overstepping the line when stating that they have set up LLCs and it was not an issue. Think of this analogy.
I am traveling on I-5. My highly accurate speedometer tells me I am traveling at 77 miles an hour. I am being passed by people traveling at what I estimate to be 80+. No one that day received a ticket from what I can see. Does that prove the speed limit is no longer 70mph? Or, could it only prove that you know of no one who received a ticket that day?
If you go down the route of not following the SEC and state regulations, any of the investors can turn you in later when they want to force you to buy them out. Assuming one was married, they might be getting a divorce and their soon to be ex wants cash. Or, the ex is being awarded the shares and they want no part of dealing with you. Why leave yourself exposed? Even if there is no SEC issue, think about who might become your 'partner' later.
One last point. Amy has a service where you book a small time slot for a reasonable fee. She will then provide advice based on what you want to know. Consider getting in touch with her and her law firm.