Think about it for just a minute.
Widespread is better than Sakuretsu for 2 reasons:
1. does not target,
2. cannot be evaded by switching out for another special summoned monster.
That being said, a deck with Balance skill and 3 of each is gonna be pretty sick.
You literally won't be able to destroy any of their monsters by battle.
Sakuretsu Armor is far worse than Widespread Ruin, for a start this card targets and doesn't bypass dodging effects like Mask Change, and it also does not get rid of the biggest threat regardless of what monster attacks.