I know cleanse is a strong spell for high elo players, but ultimately it's less useful than other summoner spells. Besides, 
already does the exact same thing.
Anyways, cleanse should be able to clear suppresion such as from Urgot, Malzahar, and Warwick
That would remove those champions viability if a summoner spell could make all their ults useless.
Cleanse and Barrier both need an extra something or other to compete with Flash, Heal, and Ghost which do their jobs better.
: Removes all disables excluding airborne and suppression, then for 1.5 seconds grants slow immunity, immunity to grievous wounds, and 65% tenacity. Activating this spell when not disabled creates a spellshield that blocks the first enemy disable excluding slows for the next 1.5 seconds while providing slow- and grievous wound- immunity throughout.
: Shields you or another allied champion for 60-285(+8% of the target's maximum health) damage for 3 seconds. Enemies that basic attack the shield during this time take magic damage equal to 25% of the damage blocked.
