Making Barrier a better summoner spell

Since S4, Heal has been the main defensive summoner spell, with barrier being picked extremely rarely. Barrier defends you for more and is on a 30 second lower cooldown, but heal can heal 2 people allowing you to save allies and gives you a movement speed buff which allows you to chase or run away more easily. Heal is also permanent, but barrier is temporary.

Barrier change: When barrier expires, 3 seconds cooldown is refunded for every 2% of barrier remaining. This means that if barrier is used, it needs to be popped else it will go on a much lower cooldown. The numbers I've given can be tweaked, but this would mean if barrier is used accidentally/not popped at all its cooldown will go down to a 60 second cooldown from 210 seconds with these numbers. I think it would make for a much more interesting choice with heal VS barrier.