IMHO, there is no way to have perfect balance in a game that supports the wide class styles as D&D 5E.I didn't create this thread because I'm personally have pacing problems when running games. My reason for posting this is that I've never played in a game that had the recommended number of combats as presented in the DMG and it seems like the developers balanced things around a sense of pacing that most people just do not follow, from my experience. I've never been in a game with more than 4 combats in a day, and it's generally a lot less. I'm running a rune knight in a campaign now and we're at level 7 and I've i played all of the way through Rime of the Frost Maiden from level 1 to finish with a fighter -> RK. After getting the subclass at level 3, I have yet to participate in a 5e fight as a rune knight where I did not have Giant's Might up and it's a power you only get twice a day to start out. I'm curious if they tried to balance the game around a pacing structure that (most?) tables do no follow.
They tried with 4E, but for many people just didn't work well (even if there were some good ideas).
I enjoy pushing my players and my own PCs to their limits at least now and then, that's easier with 5+ encounters.