This.
A new damage ult would be cool. The utility stuff is kinda getting old.
Braum - Knock people up and make them aids slow.
Gnar - Knock people around him into walls and stun them, but only in huge form, deals some damage..
Azir - Make a big gay wall
Reksai - Tele to a tunnel
Kalista - Merge with your bonded buddy and then move to a place not far away, knocking up people in your path.
Ekko - rewind time, healing him and moving him to where he was, doing damage to people in the area where he was (almost riot)
Bard - stasis for an area
Tahm Kench - maphack with a buddy(optional).
Kindred - No death in an area (what)
These are just the champs that have been released since i started playing.
And honestly that ult is gonna break the game... basically you put yi with kindred, have yi stack damage, then kindred ults, no one dies, then yi qs and gets a quad. or fizz gets off his pole. Thank god they got rid of the old fiora ult before this came out. There's still the issue of the Galio and the amumu, and the fiddle, and the garen...
If you want more utility make an ult that turns someone into a ghost. It doesn't let them interact in any way for 5 seconds, but they can move through everything, and with enhanced movement speed. They also can't take damage.