Until last year, I only DMed D&D games. It's a real issue when combat feels either very easy or very dangerous and eats all the resources of the party and the insist on taking a rest. My biggest issue with 3e and later versions of D&D is that it got really complicated at higher levels. Combat took a lot of time, lasting a lot of rounds.Speaking of different campaign styles: The current player culture in 5e is definetly more "story-focused" and less dungeon-crawling, open-exploring. That means more games have less combats and thus better rested parties and thus the internet complains about the game being too easy. But thats just the overall culture, if you find a group that wants more of exploring and crawling, you definitely can do it in 5e. And if not you can adjust the difficulty with the tips above.
I recently started running Dragonbane which has quick combat with nerve in them. It also flattens the power curve quite a lot. For one thing, HP doesn't "level up" like the skills does. It's basically static. You can use the equivalent of feats to increase it, but you typically only get one or two of them per adventure.
The foes in Dragonbane also have a more flattened power curve, so even starting characters can fight a Troll. The same troll is still a relevant foe 20 sessions in.
For me, Dragonbane sort of stays in the feel of D&D between level 3 and 7 without it really being the same at all.






