Last two Leona buffs are a nudge into the jungle.

W change is literally useless for nearly every interaction a bot lane Leona would be involved in. It does however, increase the health of her jungle clear, specifically with the camps she had trouble with before this change.

The Q buff from 6s CD to 5s CD puts her AA reset on such a short CD, that shes essentially AS capped at lvl 1. Which gives her fat Machete synergy. And further increases the value of a Warrior Enchant vs Cinderhulk.(Warrior is significantly better now) Which lets her clear as quickly as any meta jungler. The Q buff also brought back her dueling power as a fighter champion.

Shes extremely Rune flexible and build flexible, and can fill almost any role from the jungle. Fighter/Bruiser, Tank, Support Tank, Assassin.

Core build: Enchant Warrior, Boots of mobility, Deadmans Plate. Ban Morgana, you'll have a good time.