Keep in mind I haven't watched dozens of games yet, this is just my first impressions.
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For me, Pro View is less enjoyable due to lack of commentary (this is personal preference I'm sure)
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Pro View is MUCH more educational though
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Pro View can be boring, I zone out sometimes. But watching and discussing games with a friend is a good time.
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LCS bot lanes play very passively for the most part and seem very risk-averse
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Sneaky is probably the best CSer of all LCS ADC's.
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Bang plays extremely passively and basically does not attack.
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Aphromoo also players extremely passively and did not throw a hook on Thresh until thirteen minutes into a game.
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EU players tend to say GGWP but NA players do not, at least I haven't seen it yet.
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Arrow is very aggressive, as is Wildturtle, and Sneaky is as well. However, the supports play passively.
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Doublelift coordinates incredibly well with junglers.
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Playing scaling champs seems strong in LCS due to passive play.
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Teams lock in Lucian but play him passively and do not look for kills in lane at all.
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Players seem very worried about making aggressive players into Sivir.
That's it for now. I recommend buying Pro View if you want to improve.