If you are looking at the index finger style of the Sensation, but you don't want to look at the D-Loop why wouldn't you be looking at the Whisper?
I am hoping that Carter will some day make the Insatiable with the same open hook and stealth of the Whisper. I love holding on to the Insatiable. Not sure there is another release out there that feels that good at full draw! Unless maybe the Insatiable 2 
It looks like you can attach the Sensation with the jaw locked but I can't tell for sure. The Whisper has the open hook so I don't have to open and close the release over the D-loop. I know there's not going to be anything quite as fast and easy as something like my Wise Guy in a thumb release where it's a simple, nock the arrow, push the trigger forward, run my thumb up the string till I hit the D-loop, put the hook in and draw. But I'd like to get as close as possible.
The easiest way to put it is that I'm looking for a thumb release that I can operate as easily as possible by touch alone. When I'm hunting I'm always on the ground and calling by myself, I want to be able to keep my eyes on the animal coming in the entire time so I know when to freeze and not have any head or hand movement. I know there's a lot of releases you can just hook on the loop and leave there but that's not a habit I want to start, so with those requirements it leaves me just a few releases to look at.
