Windwall
What if windwall was changed so that:
- it has 5 seconds of CD
- it dissipates immediately upon reaching its max range
It would still work as a last second reflex and would still be able to block ultimates, but would need very good timing and wouldn't completely cut off an entire team from the fight.
As a compensation it could have a much shorter cooldown, meaning that its power shifts to multiple well-timed procs to block critical spells instead of a single big one eating everything.