What is the problem with Puck?

I am right now watching ex-quantic vs. next.kz and realized I didnt see Puck in a very long time. This makes me curious whats the disadvantage about him/her.

Puck obviously needs a solo lane for the levels, Illusory Orb is both a high range farming/harassing skill and an escape mechanism. Shift is now without manacost and therefore spammable, perfect to dodge stuns or even auto-attacks. Once hitting level 6 the ultimate helps very good with crowdcontrol and synergies well with more commonly played AoE-heroes like Tide, Sandking, Enigma, QoP, ES, ...

Drawbacks would be no real disable and being squsihy. But is that really so bad compared to the advantages?