Time = XP
In D&D and similar experience-driven systems, xp roughly represents time spent playing. This is true when WotC says that Adventure League standards should be about 4 hours to level to 2nd, and then 8 hours to 3rd and the same for 4th, etc. This is what it has always meant, and the way it functions is to incentivize certain behaviors and play styles.
Why not just have XP = time played? This would work equally well for your home game as for organized play, and would work better than every system for leveling in organized play I’ve ever heard of. It would be easy to track across games, including for players and DMs without consistent play-groups.
This system can be hidden behind a milestone leveling system, and just have milestones equal X time played. Honestly, it’s what most DMs and GMs who use a milestone system are doing anyway, and is the thinking behind xp going back to the beginning. In terms of design, experience points are a reward for the player, so why no reward the players for their time? This would also unhitch xp from certain behaviors. So PCs would not need to go out and kill things and take their stuff. They would level just the same for RPing, or shopping in town, or exploring new places, or doing upkeep on their holdings. They can do whatever they find to be fun in game.
Yes, this drifts D&D significantly from its design, but I don’t think that’s a problem.
Using 5E Exhaustion More Often
Exhausting is an interesting mechanic, and almost never gets used in games of D&D 5th Ed I run and in which I play. I think it was used for the fist time in the 10th session of our current home game, and it was funny because I was the only player who even knew about exhaustion rules. So here a few other times to engage the exhaustion rules, imposing a level of exhaustion for each of the following:
- When you are dropped to zero hp, even if immediate raised back up (i.e. by Healing Word)
- When you take damage in excess of a threshold (maybe that threshold = 2x your Constitution score) to represent a sudden, significant injury
- When you roll a 1 on a saving throw
- When you fail a high-risk skill check, but the DM wants to let you fail forward (you miss an Athletics roll to jump a chasm, so the DM says you cling to the far side and drag yourself up, but it costs a level of exhaustion)
As written, healing potions in 5E restore 2d4 +2 hit points per level of potion (i.e. 4d4 +4 or 6d4 +6). Why not have a healing potion instead restore 2 hit dice +2 for each level? This would mean that higher-hp classes like Barbarians would benefit more from a healing potion. As it is, past level 1 or 2 a barbarian won’t want to use an action to restore 7 hit points on average, and higher level barbarians who have more powerful potions won’t bother using them either because they’ll make such a small difference.
- Healing potion: 2 hit dice +2 restored
- Greater healing potion: 4 hit dice +4 restored
- Superior healing potion: 6 hit dice +6 restored
Stolen Skill Challenge Idea
This is an idea my friend Brett, who is our current DM, stole from another DM, and I’m stealing it as well. The idea is that for shared skill challenges (like the ubiquitous Dexterity (Stealth) checks made to let the party sneak around), you set a total that they have to hit with their rolls.
- Relatively easy challenge: 10x number of characters
- Opposed challenge: passive score x number of characters
- Ex: if the PCs are all trying to sneak past a guard, and the guard has a passive Perception score of 14, then their Dexterity (Stealth) rolls would have to total more than 14x number of PCs
- Normal (?) challenge: 12x number of characters
- Really challenging: 15x number of characters or higher