Well, here's Houserule [deletion] #1 for me. Pullin' this CR/encounter building business right out.
Encounters are...well, encountered because they have a place (however periphery) in the adventure/story. There is a reason a creature/group of creatures are in a particular place when the party finds them at a particular time.
That may be something that can be talked out of, snuck around, [most often] fought through, or possibly intimidated, lied to, overpowered/over run, wheel n' deal, bribe outright, or possibly (if the dice gods are good to you) eeked out by the edge of your blade. They can be easy, simple, difficult, surprising, challenging, and, yeah, deadly. Depends on the nature of the encounter...its reason for being [why the encounter is there at all] not some cooked up "CR". Its reason for being is not because the pc level is X, so the encounters "should be, to be 'balanced'" no more than Z monsters.
Nuh no.
It's a preference thing, I know. It's a playstyle thing. I know. It's not a "right/wrong" thing [unless some rules lawyers wanna get into a RAW brawl...which they are welcome to do amongst themselves. I won't be responding to any such.]. The "guidelines/rules/rulings/whatever" are good for the folks that want/use that sorta thing. I know.
I simply won't be having it. If your 1st level party makes a wrong turn and runs into a beholder...figure it out. If you're a party of 10th level characters and the only way to get the information you need is to find and deal with a cowardly goblin merchant that any one of you could step on and kill...then that's what needs doin'...figure it out [and try not to kill your source of information]. 5th level PCs vs. a family of red dragons? 5th level party vs. 5 kobolds setting a trap for the adventurers their scouts told them were coming? 20th level PCs against an entire army of demonically infused hobgoblins or a 3rd level party against a water elemental hydra? Figure it out. It's all fair game. It's D&D. Open season on fun. Fight 'em. Talk to' em. Try to sneak by 'em...Meet an encounter, figure it out...that's the ADVENTURE!
Where's the adventure in:
DM: "You see a group of 5 goblins and an ogre."
PL1: "Cool! That's exactly appropriate for what we need to be 'challenged.'"
DM: "A moment later, second ogre is comes around the corner, having heard the jeering and warning cries of the goblins when you knocked the door in. He won't be in melee range until next round, though. Roll initiative."
PL2: "Wait, there's TWO ogres? And goblins! Are you MAD?!?!"
PL3: "That's not the rules!"
PL1: "But we're only 1st level. You're a 'killer DM'!"
PL3: "Big jerkface."
PL2: "The CR should only be X. Yur not doin' it right!"
DM: *facepalm*