Mmm yeah, The Berlin Interpretation is way too specific, things like the graphics/grid etc. If some game fits more than half the factors, perhaps that should be considered 'like' enough? But I do understand why people can get anal about some games being categorised as Roguelike when they are infact not very similar at all.
I think it boils down to genre being misused in general, there's games with large open spaces called Open World, when they are not really, games that are called MMO when they are not. RPG games that are not actually RPG etc etc etc. Rogue fans just made a bigger deal out of it.