I looked again at the Fighter Surge and Knack cass feature. The idea of having arbitrary numbers of day feature worried me a bit... it did not match martial aspects but it didn't bother me that much.
Then it hit me.
Fighter's Surge (A feature that might be rationalize as a burst of extra energy) is 2/day. The fighter's Con mod is +2.
Knack (A skill based feature) is 2/day. The rogue's Int mod is +2.
Hmmm.. Channel Divinity is 3 times a day for on cleric and 4 for the other.
Hmmm... Could it... Nah... Maybe... Hmmmm...
Then it hit me.
Fighter's Surge (A feature that might be rationalize as a burst of extra energy) is 2/day. The fighter's Con mod is +2.
Knack (A skill based feature) is 2/day. The rogue's Int mod is +2.
Hmmm.. Channel Divinity is 3 times a day for on cleric and 4 for the other.
Hmmm... Could it... Nah... Maybe... Hmmmm...