On champions rework

I was asking myself : If a lot of people don't like the rework of a champion, why does Riot not make a compromise? I mean they could let players choose on champs reworked between multiple abilities before or during game. As an example, a player could pick choose the abilities of the old Aatrox before the start of game, like choosing the old W of Aatrox but keeps the new abilities of his rework.

This idea is similar as in Hots, where you can choose between multiple abilities in-game. In other words, Riot could try to let us playing the champions before reworked and reworked.

In this way, everyone would be happy after a champ is reworked. Same if only 10 % of players dislike the rework of a champion... 10 % represents probably 10 000 players (probably more than this). So, it is still 10 000 players that are not happy.