@More_Spinach You’re saying your own inability to account for IE8 in your code is Ember’s fault. All of Ember 1.x.x works out of the box with IE8 with no hoops, standing up straight, with empty hands. If you are writing code that doesn’t support IE8, there’s nothing Ember or any other framework can do to help you, because we can’t magically fix IE8.
What you are asking is akin to a contractor being asked to build a house, and once he has finished the job and moved on, being brought back and told the house is no good because the new resident redid all the siding, plumbing and roofing and now it leaks everywhere all the time.