A few ideas or suggestions to buff not so picked summoner spells...
Have it explode or reflect some of the damage it receives
{{summoner:2}} place a ward anywhere on the map from any distance
steal mana from a targeted enemy champion based on level (sadly there's a lot of champs this won't work on )
immune to slow, have it make a small dash at the end of it that could go through thin walls ( like a ghost phasing through )
lower the CD a bit
and 
has a range limit. {{summoner:2}} does not.