Why did Yuumi even get released?

I don't understand why Riot would release this champion with a pretty unique gimmick and not stand by it. Riot went ahead and pissed people off by releasing the champion in the first place and people hated playing against her, then they gutted the champion so Yuumi mains get to be pissed at Riot too now. It was pretty obvious from the start that Yuumi was going to be an issue in pro play (in fact, most pro play problem champions are pointed out before their release and people are correct) so why even let the champion come out? There's literally nothing else like her in the game so a lot of support players feel a void in their roster and miss Yuumi's playstyle, so why even give people a taste then take it away after a couple months?