Have you read the whole article there? They are including a nifty device that will let you hold the mouse in air without acctually lifting it with your muscles. It is done via "u" shaped railing system, so your wrist can relax, while you're flying a littlebird in BF4
Also about the deep click - you will be able to assign a keyletter to a function inside the software, and than you can just edit your shortcuts in game or app to that direct key. For me it looks just as hard as any other mouse for MMO (I own a G600, and G13, and K65RGB).
The only disadvantages I see for this mouse are :
PRICE & so called "Pivot" action.
First is pretty self explementary, second - being - when mouse will/would register just me moving it on the mouse pad as pivoting (not intended)