Here's all of it if you don't want to click the link:

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Floating: My biggest pet peeve

Camera battery ran out, so here's the main points and additional ones I forgot to mention (Tl;Dr at the very bottom):
—"Floating" is unnecessary (usually unconscious) movement of the hands and arms which are meant to make mechanics easier, but serve instead to distract from them.

—I'm not talking about all cuts when addressing floating. Extra movement works best when the cut is flow-based, when the cut was designed specifically for big motions, or when mechanics are sharp and clear (think right angles or @shivraj_morzaria's old cuts). Eliminate floating with close, packet action or when encountering any intricacy that you'd want to visually simplify for your audience.
—Floating is bad because it distracts from the mechanics and brings attention to your hands (and your inadequacy). To both look better and be better, be mindful of your floating during practice and structure your flow around the mechanics, not your muscle memory.
—An easy way to focus more on mechanics than muscle memory is to focus more on finger movement than hand and arm movement. A little hand and arm is good, but the fingers will do the majority of work in intricate packet interactions. If your cut has both intricate action and a need for big hand motions, maybe consider dropping one of the two features to make your cut more palatable.
—Before you say to yourself "it's too difficult to remove my floating", consider the better results you'll get from slow, deliberate practice.

MOST IMPORTANTLY: this is only my opinion. I may be wrong, and there will always be exceptions. A few cardists like @swhlr, @johannes.ver, and @joe.tchek can make floating look good. Chances are, you are not one of them. If you want to learn to float effectively, learn how to control your speed and range, construct cuts which give you freedom to float, and recognize when you're using too much.

Tl;Dr: Don't needlessly "float" your hands around to assist mechanical cuts and intricate packet interactions. Most of the time, it looks bad, makes you look bad, and is distracting. Remove these motions during practice so that you flow in an efficient way which complements the mechanics.