If @RIOT wants diversity, why there are the same spells in every game?

riot should bring more options for summoner spells to bring diversity and utility and revamp current ones

for example u could add 30% slow resistance and maybe lower cooldown could be mixed together so is a real alternative against heavy cc comps we could have new summoner spells like we used to have before for example the tower immunity spell or many others

because seriously in every game all 10 champs are using and the only diversity there are a mix between

so basically most of team comps are like this

sum 1 sum 2 sum 3 sum 4 sum 5

so maybe riot wanna think about more options for summoner spells... maybe