Neonchameleon
Legend
The thing about this is that 5e combat is on any scale I use pretty slow. It's faster than 4e because there's little in the way of tactics and reactions. And it's faster than mid level 3.X when there's the buff layers to calculate. But there is serious hit point bloat in the game; an AD&D ogre had 19hp, a 3.X ogre 29hp and a 5e ogre 59hp. And that meat takes time to grind through.Something else to keep in mind, 4e has a very different focus than 5e. In 5e, the goal is to get through the combats quicker so everyone can focus on the story and the campaign. You're gonna have combat encounters, obviously, but don't dwell on them too much. There's more to get through, and players want to feel like they're making progress with every session.
I play games with fast combat, I play games with tactical combat, and I play games with evocative and descriptive combat- and to me 5e succeeds at none of them.