Is it me or is Rito (Riot) slowly reworking champions every few patches?

Just as the title says. All I'm asking are opinions on the few patches that weren't major, but had changes to champions that affected their playstyle in a major way.

An example of this would be the patch (I forgot which one) when Azir got a slight "rework" on his passive and E. Original passive: Gives X% amount of bonus Attack Speed depending on X% of Cooldown Reduction. And his E which had its knockup removed.

Another example would be the change to Hecarim's passive with the removal of his ability to go through minions all the time.