From my understanding, Sacred Surge is the ability that Wynn gave Paladin so that it doesn't deal 2 damage every time it hits something. Dealing 200% of your DPS it seems pretty good. (80% less than a double bash moment). But there's one small issue: 1: It takes 25% of your holy power, so it doesn't come up very often, and 2: It only hits a single target, so even when it does it's completely useless against multiple enemies.
So here's my 2 propositions: Either 1: Make it so Sacred Surge strikes ALL enemies hit by the initial attack, or 2: Just make Sacred Surge deal AoE damage around the one mob it strikes. (Even if its only like a 1 block radius or something its still better than single target)
Like... It looks like a lightning bolt. Surely it has to have SOME collateral damage
and... also maybe give it slight damage buff I didn't realize it was weaker than a double bash.