My problem with pure co-op, especially pandemic, is that what usually happens is one player ends up doing most of the actual “playing” and the others just provide a few suggestions here and there.
Both MoM and DoW limit the things you are allowed to share with the other players too, which makes this happen less often, and in DoW every player has a unique hidden agenda in addition to the group goal - which gets fun if they do something weird because you have to work out if they are a betrayer or just have a weird agenda.
DoW looks interesting, but not sure how possible it is with 2-3 players and it is harder to get a larger group now in the middle of the pandemic.
The expansions allow twelve players, which I strongly recommend only doing with experienced players - it takes a whole day and people give up if you have to explain all the rules over and over.
BoardGameGeeks rankings push it way down, which seems to be a common theme for popular mainstream games. Though the ones at the bottom like Monopoly and Game of Life are truly horrible and give board games a bad rap: fulling deserving of their ranking.
To the right of Risk looks to be Stratego which was a fun game when I was a kid.
I like board game geek, but it has a bit of a movie critic problem in that the most popular, most played, and most fun games aren’t necessarily highest rated.
It is also very well known, so any negative reviews have the added bonus of extra attention. And the criticism was novel a few years ago.
Sure, the house rules can make it more fun. But I’d argue, if you are just changing the rules, do you actually like Monopoly? Why not buy a game with rules you like?
My biggest problem with risk is the huge element of chance.