Hey RT. I have never been in an Eno dbl, but I have read that you can get pretty flat! The biggest difference I have felt, comming from a HH Exp UL, is a flatter lay and less shoulder squeeze.
I never had a problem with the birth, but I enjoy being able to reach out and do whatever. The Eno may be perfect for you, but this is all about picking and choosing (customizing) your setup.
For many simple is better, I enjoy having a few extra "conveniences". We are all part of the club! If it works for you that's great. Happy hangin'