Well again, I don't really see the bonus to saves as the issue. Though the Peace Cleric, for example, lets you stay farther apart, which negates a big problem with Paladin auras.
You absolutely need saving throw bonuses at higher levels.
My confusion stemmed from the thought that bounded accuracy means you should accrue attack bonuses much more slowly, and things like Bless giving you a large bonus seemed a little strange.
As many have pointed out, however, enemy AC's are generally low, so the attack bonuses aren't necessary, and they may not necessarily have the impact one might suppose.
Getting +4 to hit on an attack that was going to hit anyways doesn't do you any good. +1 on an attack that will miss (the other extreme) might not do anything. If Bless was an always available bonus, it would turn misses into hits, more often, but it appears that if you are facing appropriate enemies, you likely don't need this benefit.
It's a little strange, to be sure, but that's the game that was made.