Not everyone agrees about IE11, but we are trying to make it better. Better emulation is one place we could do better - I'll shill a bit and call out that we do use our Uservoice [1] to prioritize feature development, so please feel free to add your votes/ideas. I can say that some of these are already in the internal builds :)

[1] https://wpdev.uservoice.com/forums/257854-internet-explorer-...