I think CDR might not reduce the charge-up time of shrines as efficiently as it should, unless you implement a special scaling just for those shrines (e.g. doubling the value of CDR on their charge-up or something). The core issue with Bard's shrines is that their charge-up, which makes sense in the laning phase when too much free healing is bad, becomes such a hindrance in the late-game, where people stick way less to any single location, that there's no real occasion where laying down a shrine so much in advance will have a substantial payoff. I think one potential solution could be to have the charge-up time on those shrines get reduced by 3 seconds per rank in Tempered Fate, so by level 16 you could lay shrines down juuuuuust a little ahead of your target for a better case of risk versus reward (though there might need to be an increase to the fully-charged heal at that stage too).