Some of the guys in my regular 5e group are becoming a bit bored with the simplicity of 5th edition combat. Not having played through 4th (oldschool returning 2e guy) I don't really have much of a point of reference.Do any other people in here share this problem, and have you any examples of house rules or other methods you use to spice up combats which might otherwise me a bit ploddy?
I'll come at it from the opposite angle: My table is full of veteran players who LOVE combat. I have been trying to consider why - when many folks find 5th edition combat dull or boring. I'm not sure I have a great answer (except, maybe, my players are just different), but here are some characteristics of our combats/game:
1. The combats are very high paced and I do use scenery and miniatures. My players are miniature and terrain enthusiasts - so well-painted and constructed minis and terrain are a big part of the game for us;
2. I re-skin a lot of monsters. Many times players don't know what they are facing.
3. Monsters come in waves. As others have said, D&D is a game of attrition.
4. Monsters come from lots of different angles. Monsters fly in, teleport, come up through the ground, and approach from multiple directions.
5. As I referenced above, I use lots of terrain and incorporate a lot of vertical terrain these days.
6. We do not use a ton of description for every combat action. Too much description slows things down.
7. Monsters run away and warn others. Sometimes the monsters' offensive weapons are not the threat - their ability to warn others is a threat. See using waves above.
I fully realize none of these are necessarily "fixes" for your players. However, because you asked in the O.P. for methods and house rules - this is my list.
Good luck!