What did you move over, if you don't mind me asking? I'm thinking that changing the encounter guidelines to 3 to 4 encounters per day and aiming for harder encounters, still with 2 short rests a day, will make for a more 4E experience. Even with putting in 4Es 1/2 level scaling, monsters still scale very differently (they're almost like solos), but I still want more 4E esque monsters.
Well on top of my head:
- I merged 4th Edition Themes concept with 5e Backgrounds to get more of the juicy bonds, flaws, etc for roleplaying purpose
- Inspiration system (with some small modification)
- Bounded Accuracy (i.e. Progress att +1 per 4th level instead of +1 per 2nd level)
- The later impacted magic items from +1 to +6 down to +1 to +3, which makes the system less magic item dependent for hitting monsters.
- It also made DC ranges for Skills more "narrow" with some positive effects to it.
- I also reworked the XP per monster, XP per Level and XP per Encounter to be more balanced with the impact of monsters having bounded accuracy level progress
- When redoing some monsters in 4th Edition I mainly had to do some Changes for the bounded accuracy effect, but I also borrowed some of the good traits that 5e monsters have.
- I cleaned up the feats section from all +1 to hit effects
- I have gone through most rituals in 4th Edition and added the 5e descriptions of the spells (when I think they are better worded), as well as created psionic mantras following the rituals setup.
- I have introduced some 5e combat conditions and also introduced slashing, piercing and bludgeoning as new damage types as well.
- For the players I have done class compendiums for (compiling all 4th Edition class Powers with errata into a single document per class) I have also added "outside of combat" skills that was introduced in 5e but did not exist in 4th edition in order to increase roleplaying opportunities outside of combat.
/Myrhdraak