The problem with CotC isn't that it's too strong, it's strong on too many champions, so HOW ABOUT...

INSTEAD of being a fixed-duration shield that gets smaller with every patch, we make it start decaying 1 second after hard cc from its champion of origin expires, so it is effective when triggered by champions with stronger initiation abilities but weaker for champions that only inflict brief hard cc?

IN ADDITION, how about we revisit the other Resolve keystones, since not only is the problem that Courage too strong, but also that the other keystones are too weak, and are only worth considering for champions who can't abuse Ferocity keystones or CotC?

The way I see it, the problem with CotC can be summed up like this: Almost any champion that maxes Resolve and has a way to inflict hard cc is a champion that should be using Courage of the Colossus. Obviously, this needs to change, and instead of nerfing CotC into the ground, I think a better alternative would be to make CotC a more specialized keystone, and polish its counterparts so they get their chance to shine as well.

For Courage of the Colossus, this means making it so that champions with very brief hard cc (such as Darius with his pull) cannot make as effective use from it, and in turn make it the better choice for champions with more impatcful tools for inflicting hard cc (such as Leona and Amumu).

For Grasp of the Undying, this means getting rid of its damage aspect (which is about as impactful as Fresh Blood (a tier-2 mastery) and completely irrelevant late game by the Titanic Hydra) and making it solely a source of sustain for tanks in extended fights. 3 or 4% max health healing every 4 seconds while in combat is a decent earlygame grab and useful in late game fights since the "% max health in-combat sustain" niche is untouched.

For Bond of Stone, this means buffing its damage reduction aspect (which currently provides a negligible amount of effective HP for tanks compared to the other Resolve keystones, which can be activated indefinitely to extend the amount of HP they give you. Grasp, as weak as its sustain is, outperforms Bond after 12 seconds in combat, and CotC blows it out of the park if even its smallest shield absorbs its full amount of damage). Additionally, the damage redirection mechanic should automatically target allied champions that are taking damage (prioritizing those with the least health) rather than mindlessly directing damage from the nearest ally.

As a top lane main, I'd really like to see more fairness in the Resolve tree keystones, and see Courage of the Colossus has a more specific niche rather than being nerfed into meh-ness like Grasp of the Undying was. It would also be great to see Grasp of the Undying a desirable keystone for top lane and Bond of Stone for support, so there is a more significant choice for champions who can use both, and so the champions who can't use CotC don't feel left out.

I'm curious to see what people think about my proposed change to CotC (would it be better than simply reducing its shield power further or would it still be problematic?), but be sure to comment what you think about the other changes as well!