And i completely disagree with you.
First of all, I'll admit i'm bias and i don't want me favorite champion to be changed in any sort of ways that could lead him to be on the next huge nerf train.
Q, early game is one of the most versatile ability in game. The utility it provides in both ganks and counter-jungling is beyond superb. The early level guaranteed critical hit when emerge out of stealth deals immense damage on champions.
As for your concern about ult, I, again disagree. Shaco's clone was never supposed to be like tibbers, who soaks up damage. Shaco's clone is there to deceive the enemy, to juke the pursuers and even to dodge skill shots that couldn't other wise be dodged(Karthus ult for a great example).
I understand we may have different views on this matter. But as Shaco has helped me climb from silver all the way to diamond with his current kit, I think he is perfect the way he is right now.
If you want, add me in game, we can discuss pros and cons and possibly, give each other tips on shaco :)