Savage Wombat
Adventurer
I don't know if I necessarily want to have it included, but I did very much like 4e's idea of the giants as Nephalim-like descendants of the elemental creators of the world, instead of just another humanoid race.
...and while there are select things from the 4e planes that could be poached for 5e...
I would like to read about dragons, rided dragons, dragon highlords, dragon orbs, and... yes you understood... dragonlances!
Dragonlance setting apart, I would like to read more about knights, peasants, castles and medieval lore. I think that D&D has got to be too much fantastic in last years. And too much dark: I prefer "regions of light" to "points of light".
More shining armors, white horses, sunny places on art please!
The Great Wheel and its three editions worth of development on the history and origins of the various D&D outsider races and their respective planes. A vast amount of that was gutted or radically transformed by the PoL cosmology in 4e, and while there are select things from the 4e planes that could be poached for 5e, I truly don't want to see the PoL planes imposed for a second edition in a row.
Oh, heck yeah. I saw this trend in some of the 4e setting books. Why are there warforged clerics in Dark Sun? Don't know, but at least you can do whatever you want.Actually, I'd like to see some of the stuff go BACK into their respective settings, rather than get slammed together into the core. Each campaign setting had cool elements to it (Vistani and Strahd in Ravenloft, Sigil and tieflings in Planescape, draconians and death knights in Dragonlance, Warforged and Shifters in Eberron, Mordenkainen and Pelor from Greyhawk etc) that got ripped out of their native homes, run through the setting bleach, and presented in the core devoid of all its original interesting fluff and place. I guess it makes sense to cherry-pick the best from the settings you have, but reducing vistani to "just a gypsy clan (that allows halflings!)" or making warforged just another monster (or PC race) destroys the unique setting elements that they had in there respective worlds...
Belly button lint. That's my favourite kind of fluff.
Combine it with satchel fluff, seat cushion fluff and pocket fluff and you can make something really special.
Combine it with satchel fluff, seat cushion fluff and pocket fluff and you can make something really special.