As always, no one can ever be satisfied.
USGT is not an entry level class. It's definitely faster than trans am. The reason it's moving to a spec motor is all the 9th place 17.5 drivers who are buying $150 dollar motors so they can win in USGT. IF the problem is the drivers who have unlimited budgets for motors, or access to the best examples of motors, how can this be an entry level class?
It is not. It's not the highest level of competition, but it's not really for those who are just starting out. The intention is good close racing, fun, and at least "scale-ish" looking cars. It's been my favorite sedan class as an old, washed up, "never-was" driver. We used to have a lot of really good close races. I'd like to get back to that.
As far as the masses who are just waiting for the special, magical combination of equipment and specification to flood on road tracks everywhere, well, I have no idea what that is. It would be great if you could just take something out of the box and start driving it at a race track. Slashes were kind of like that until everyone ruined it.