With libinput 0.14 you can just use two fingers for a right click, and three fingers for a middle click. Anywhere on the pad.

Edit: as you can see with Macbooks, clickpads are not the problem. Drivers are the problem. With the right drivers [0], the T440s clickpad is very precise, clicking doesn't move the cursor, and scrolling is pixel-perfect.

[0] Try Fedora 22