I can’t answer for your expectations, because this is not a logical statement. This is the equivalent of buying an icebreaker and complaining it’s not as fast as a speedboat.
The OGL is a specialized OTB can designed to fit on fat carbon fiber barrels (or heavy bull barrels). Making it that big around also makes it heavier (more material required). It’s not designed to compete for lightest, most sound reduction, smallest diameter. It’s designed to be short (adding only 4” to the overall length) and fat (fits around thicker barrels). That means it has to compromise on other factors. It appears those other factors were more important to you, so you prefer a different can. But that’s not the OGL’s fault.
It lives up to its published design parameters. Based upon which, any reasonable person could have known well in advance that it would or wouldn’t meet his needs. Unless you have the requirements of “OTB that fits around fat barrels and only adds 4”, there are many, many better options out there (such as the Ultra 7). If you do have those requirements, you get them, at the cost of other factors.