Did Windows Phone 8.1 get the capacity to set one touch call answer ?

My uncle got a 1520 with a leather flip case, the case flip cover already acts as a lock-screen so it's extremely painful to watch him go through a 3-step process to answer a bloody call.

I can't fathom how the WP team did not yet implement the option to unlock and answer the phone with one action. Anyone know if in WP 8.1 when you get a call, can you just slide the screen up and answer the call with the one action ?