Less empty would be nice, the F:NV map might be large, but it feels empty because there's very little to it. They don't have to rework the combat system, mods work that aspect just fine. I'd hope the next one will be far less linear, in New Vegas I had a constant feeling that they had worked a timeline out which I was going to have to follow (blocking of area's with creatures). Another importent thing for me are more is more random stuff, random encounters, ambushes, random creature spawns and many more. The factions could be less one sided too, (FNV, the NCR had literally over 70 quests and the other major faction, the legion, only had 7. Post-completion freeplay is also a must. It should stay in California because that's were Fallout's roots lie and should stay. I would also like it to be in another country, but I'd would not be good for the franchise, unfortunately. I just want them too improve what it is and not change a winning team.