I also saw this game jam and I HAVE to ask why most of this stuff isn't in a patch? The ice/fire arrows, adoption, moving water that looks better, etc etc should all be in a patch. SO many bugs left to fix. I still see goats under water and dogs that walk 90 degrees over a fence. You HAVE to be able to kill the kids in the game. Distasteful yes but sometimes they're the only witness left and you don't want that 5000 coin bounty on you.
Things (that would require Elderscrolls VI) that'd really change it up would be true weapons functions, really complex button combo presses to do true martial arts styles like what was done with that spear. Xian swordplay would be a freakin spectacular addition.
In response to their question at the end of the video "If we worked like that more often what could we do?", you could have removed the frame ticking glitch from your engine the 3 times you got a chance in ES IV, FO3 and FONV and could have included interior maps for the latter two of those games. You could have taken a tonne of glitches out of Skyrim before realeasing/inflicting it on us as well.