I don’t really agree personally. I have a tiger strike/dragon tail/death sentry assassin and it’s super fun. It’s not an amazing build, but I have a blast playing it and I do reasonably well in hell difficulty.
It’s still fun. physical and fire immunes are a challenge, but that’s kinda the point of hell difficulty imho. With the changes to traps, you can spec into lightening fury to get 3 elements on your assassin if that’s the concern.