2. Is Word Wall another Oblivion Gate? I don't think dragons will be since fighting with them won't be as long as going through Oblivion Gates but since Walls are fixed to a place - Most likely dungeons with enemies guarding it....I can see people on their 5th or more playthrough thinking "Alright, Here I have to go through this Dungeon again to learn a word...." Much like going into Oblivion Gates to get the Sigil Stones....
Speculation is welcome....thank you...