Suggestion: Change summoner spells during game like trinkets
As title: allow swapping summoner spells during game like trinkets.
Drawbacks (BALANCE): Only allow switch when a summoner is up. Give them double (or more) cooldown length, when changing, and on cooldown immediately.
And let enemy know its changing and what to. Plenty of time for teams to read and adapt. Enjoy that 20+ minute (or more) revive cooldown. Don't allow smite changing, maybe.
Run level 1 clarity, no big deal. No report noob. You can say its strategy.
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