Thoughts on Being Able to Upgrade Summoner Spells?

Hello all,

I was wonder on your thoughts about being able to level up summoner spells. This would allow summoner spells to start of basic and then allow you to put points into them instead of your abilities. I currently think the lvl cap should still be 18 so that it creates a dynamic thought process on what you want to lvl due to not being able to lvl your abilities all the way up if you upgrade your summoner spells. Currently, I feel like games are boring regarding skill lvl ups and think this could be a fun way to shake things up. I'll list some examples below but I'd love to hear your ideas too!

Exhaust: Lvl. 1) Exhausted slows your targets movement speed by 20% Lvl. 2) additionally to the slow, your target does 20% less damage Lvl. 3) Lower CD

TP: Lvl. 1) You can tp to towers Lvl. 2) Acts like current to Lvl. 3) Can tp to any place on the map (this might be broken)

Heal: Lvl. 1) Like current heal but only works on 1 person Lvl. 2) like current heal Lvl. 3) heal whole team?

Ignite: Lvl. 1) only deals dmg (doesn't give sight) Lvl. 2) current ignite Lvl. 3) deal 10% extra dmg to ignited champions

Barrier: Lvl. 1) current barrier Lvl. 2) works like Morgan barrier Lvl. 3) not sure :/

Ghost: Lvl. 1) Current ghost Lvl. 2) Old ghost (instant speed) Lvl. 3) increased tenacity

Cleanse: Lvl. 1) removes cc Lvl. 2) also gives a short increased movement speed Lvl. 3) not sure :/

Flash: This is kind of broken anyways so have no idea besides make hextech flash lvl 1 and regular flash lvl 2.

Like I said I'd love to hear your thoughts and also would love to hear a rioters thoughts if possible!