Senna and Leona TUNE IT DOWN

Hello I think its pretty disgusting how senna can be either support or adc and still outdamage anyone in the botlane, if you want to make her a support champion then tune down the immense range of her Q, joke of a cooldown lategame on her root, and duration of her weird mist thing which makes your whole team untargetable.. also take her self healing away from Q its stupid and makes no sense. Why someone with an overloaded kit is allowed to do this ?

Leona would be too op even if you remove all of her damage, the problem is the easy to land and foolproof ways to hit your way too short of a cooldown cc's oh yeah and her W makes her invincible since level 3 IT MAKES NO SENSE, same goes for Nautilus it's insane how easy and rewarding it is to hit one hook.

Also while we're at it, Sett is stupidly balanced because he cant lose lane, has huge damage and health regen BUT later in the game he does nothing except cc someone once, fix it

AND dont you think its pretty stupid that you can dodge enemy abilities 20 times and it does not but new champs to danger, but if you get hit by 1 its basically lane over for you ? And what is wrong with the fact that if I outfarm my opponent I get a bounty on me ?=