Yes the MultiAir is a definitely "springy" on take offs and gears changes especially in Sports mode.
In general this is what is going on:
1) The clutch pedal not only has two position switches is also has a 0-100% positional travel metering
2) The engine ECU will automatically lift the engine rpm to 1100 (ish) rpm as soon as the clutch pedal begins to lift up. (Sort of an anti-stall)
3) Throttle pedal response is much more biased and compressed to the 1st travel region of the pedal.
The wayI've managed to tame/control and get used to my 500X MA is to stick it in Sport Mode and drive it in that mode for several weeks without being tempted to go to Auto Mode to check the difference. In addition in all but the steepest of hill starts (or aggressive power take offs on a drag strip) don't touch the accelerator pedal and just bring the clutch up gently. Once you are off the clutch then press the throttle pedal.
I tow a caravan and even on an incline I can get everything moving without initial throttle pedal operation.
Like a lot of things in the 500X it is all kind of counter intuitive to begin with.
Once you have mastered Sports Mode then flipping between Sport and Auto becomes dead easy. I very rarely use Auto Mode now except possibly in traffic jams around town. I just occasionally pop over to Auto Mode to keep familiar with its dead duck operational profile.
Somewhere on the Forum someone else was also unhappy with the 500X's pedal profile and has fitted a "throttle pedal modifier" control box and is very happy with the "changed" operation.
Only down side to a modifier is your insurance company might not believe you are using it to tone down the car's throttle/engine performance profile
Fiat need to add another knob/control to allow people to adjust the liveliness of both the Sports and Auto Modes. Sports mode is too lively for many and Auto Mode too flat for many as well. Two extremes and nothing in between.