Barely perceptible click on new MBP

there is no click in the 2015+ models its due to the force touch trackpad. the "click" you are getting is actually feedback from the taptic engine inside the computer.

 

Do you see in System Preferences > Trackpad > Point & Click a "Silent clicking" option, possibly checked?

 

As others have pointed out - the new "click" is haptic feedback from the motors, not an actual click. It comes with multiple advantages - click anywhere on the trackpad, 2nd deeper click for preview/look up, pressure detection, etc. However, it does have a smaller click.

Still, you'll probably get used to it. It's really good, actually.