And the Help action boosts skills by an average of 20 levels of character growth. 20!!!!!!!!!!!!!! Should we make that even rarer and more conservative?
It is a +2.5. Yes, a +2.5 is good, but you can't exactly get much lower. And this sure is never an argument in combat, we can see damage boosted by an average of 4.5 (nearly double) and think "meh. it is okay" but skills being boosted by half that are so terribly unbalanced?
I have never, before this thread, heard that guidance is far too powerful and breaks the game. I've heard that it is troubling it can stack with a series of other effects and make a single skill check easy to succeed, and I've heard that it is spammed constantly and that is annoying, but never that it is overpowered and broken by itself.
And I still don't get why it has to be that a caster "needs to consider" whether or not to use it. A caster never has to "consider" if they are using Mage Hand to grab something, they just do it. They never need to consider if they use their attack cantrip, they just do it, unless they want to use something STRONGER. And, as has been discussed, there aren't any leveled spells that really apply in the same way Guidance does. The only one I can think of is Enhance Ability, but that isn't "should I use Guidance or not" it is "Should I use Enhance Ability or not". Guidance is the weak at-will version. I shouldn't have to consider whether or not I use it any more than I should have to consider whether I use minor illusion to make an illusion, spare the dying to stabilize someone, or an attack cantrip to attack someone.