A way of automatic installation of extensions
All other major web browsers (Chrome, Firefox, and Internet Explorer) provide some way to install an add-on/extension by the application installer. Most antivirus programs and download managers make use of this capability.
With Edge, the end user, after installing the main application, has to go to the Store and add the corresponding Edge extension manually herself.
There should be way for the extension publisher to obtain Microsoft-signed extension package from the Developer Dashboard, and include it along with the main application installer, to be added later to users' systems by powershell's Add-AppxPackage, or its equivalent.
100% agree. There are legitimate business reasons to allow programatically installed/enforced extensions. IE has it, Chrome has it. Firefox doesn't let you enforce, but at least you can install. Edge seems like a half-baked toy because of this limitation. Browsers that do not have this capability are not options for businesses that need it.
Ofek Shilon commented