If you take a look at the angle of the slingshots you'll see they are steeper than normal. This is because it's designed for a different mechanism i.e. Magnets. Because of this the pro plays like a dog. The premium though is a stone cold classic. It's only linear if you play it in a linear fashion, don't shoot for start scene with the skill shot but rather light scenes using slimer. Thought has to be given to the order you complete the shots in the scenes to allow proper progression through the modes. The captive balls are a hugely overlooked strategy too.
Great innovations, dots are brilliant and with the sound mods available, superb sound too. Colour dots are going to be awesome.