I'm coming from the other side and bemoaning when a game is on ESPN/2, as the base ESPN + doesn't give you access to those channels.
Not the same thing as being combined as an individual product but I do like the fact that if you are a subscriber to a service that has the ESPN family of channels (like YTTV) that you can login using your YTTV credentials and all of the ESPN channels can be accessed thru their app along with the ESPN+ stuff. Still not ideal as you are paying for another service such as YTTV and not a huge deal but it can cut back a bit on going from one app to another.