The core issue
Feel like a lot of leagues problems stem from the current state of the meta.
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weak towers
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increased damage buffs (class reworks sorta did that)
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dragon buffs
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rift herald
These all create a snowball meta. I can understand riots need for wanting shorter game times vs how it used to be, but i myself find snowball metas to be boring. usually the games are determined early on who will win. Throw in dynamic queue (referring to the grouping systems) and you just have an undesirable state of play for most individuals.