The order does not guarantee small business will get rates comparable to big businesses. It only lets small business band together to attempt to get a better deal from health care insurance companies.
As the business association reps in the article say, only time will tell if this order makes any difference, as these bands of small businesses still need to negotiate with huge insurance companies bent on maximizing profits.
Why is it Trump supporters always seem read so much extra into anything Trump does, and act like those things are done deals, when they are far it?