You could tweak it slightly:
Fail by more than 5 - unqualified failure
Fail by 5 or less - success but with a consequence
Success by 5 or less - unqualified success OR success + consequence + opportunity
Success by more than 5 - success + opportunity
Yes, I am thinking that too, after what was said in this thread. But, respecting the ratio between consequences and opportunities that I had originally proposed. Putting together what you propose with the O&C rule, it would be something like this:
Fail by more than 5 - unqualified failure
Fail by 5 or less -
the PC is successful, but there is a consequence.
Success by 5 or less -
the PC in addition to being successful can avoid a consequence or find an additional opportunity.
Success by more than 5 - the PC in addition to being successful can avoid a consequence and find an additional opportunity.
Answering other concerns, the point of all this is that consequences and the opportunities provided are only an excuse for the narrative to advance. If a DM feels comfortable doing it without these mechanisms, she doesn't has to use them.
Also, the rule doesn't have to be a burden. If as a DM you can't think of anything concrete as a consequence, just don't provide any and go on.
I understand that, as stated above, the basis of this rule (or approach) is that if there is really no consequence to a check it should not be done.
I'm curious though, could you come up with satisfying complications for the 8 scenarios I listed?
I thought you had put the situations as a way to prove your point, not with the genuine objective of knowing more about my perspective, I apologize for that.
Unfortunately, English is not my mother tongue and right now I am at work, so I cannot answer one by one of the situations you asked for.
I can give you two consequences or generic opportunities that occur to me on the fly:
-When a PC does a nature or history check to see what she knows about the Secret Valley, she can find out where the entrance is and that the entrance has a guardian, but not know who the guardian is (
consequence).
-When a PC does an insight check to see if the king is being honest with her, she can see that the king is distressed, that he is hiding something from her but does not know what (c
onsequence). Or, she can realize that the king is distressed, that he is specifically hiding from her the subject of the disappearance of his counselor and also realize that one of the members of the court witnesses the entire conversation with nerves (
opportunity).