It depends.
This one is very bad. It's a pink fireball. Admittedly the idea is comprehensible, but why is this pink ? That's unacceptable.
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This one is a pleasure to see. However, i find it "cartoon", so I'm a few disappointed about.
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Finally, this one is great.
So you cannot consider that all icons of LoL are botched works. Some are botched work, yeah, but some are well done.