Wait when did everyone suddenly decide QoT needs a buff? My friend is awesome with her. You just follow him around untill he ground spikes someone then you beat the poor person who lost all the armor to death in seconds. When they try to run, he slows them with that other ground spike skill. He also finds time to throw some shields on you while you're at it.
Queen can be played one of two ways:
Like your buddy and I like to do. Put points only into her three good skills (shield, ground, and wave) and be an above average early game demi, great mid-game support demi, and very sub-par late game demi.
Or you can go any other route and deservedly earn the hatred of your teamates.
This suggestion wouldn't be a buff to the Queen the way your friend and mine play her, it would simply give people a different way to play her by combining to worthless skills into a decent one.
Everyones got their own perspective on balance but I'll tell you one thing, I don't remember a game I've lost where the opposing queen started popping out shamblers.