4e had a fairly precise formula on how to properly balance and design encounters. 0e had none. I suspect 5e will have some, but we won't see exactly what it is before the new DMG releases.
With all that being said, how important are balanced encounters? Is it more important to have balanced encounters with new players that are just getting their sea legs than for experienced gamers?
Does edition have much to do with balanced encounters? Would 4e break if adventure writers strayed from the formula?
If you favor unbalanced encounters, is the overall adventure balanced? This would be my preferred method of play FYI.
Do you as a DM / GM give hints to your players that they might be in over their heads?
Just a few not so random Monday morning questions...