Now, I think the intention behind this change, at least on surface, is laudable. But we recently saw a change to weekly quests which seems very likely to be intended to drive player engagement up by making people play more for reduced increase in EXP. So I can't completely erase from my mind the possibility that this change was also made to increase the number of games players need to reach the same rank (and thus the same monthly rewards) than before.
No. This is purely to fight bots, and should have no impact on real players, apart from not running into many bots. Apart from bots, Peak Rank and MMR are highly correlated (which is why it was fine to work this way for so long).
People already ranked up all the time against equal-skill opponents, even in D5-1 where there were very few bots and no winstreaks.
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