Monks very weak. Need rebalance

[0caid0]

Please explain what is better.

Well its debateable if its ever better than twin snakes. Depends on your rotation. I think 2 twin snake buffed twin snakes do more damage than a buffed true strike and an unbuffed twin snake.
You can get both buffed with a low GCD but if you throw in a ToD or a fracture or get pushed away from a boss for half a second you have to go back a 2 twin snake rotation and it just makes things messy.
Personally i just use it nearly as a utility skill like the magic dispel one. The extra crit chance is nice if you need to burst something down fast.
It makes life easier having one lessy thing to worry about or track and it makes your rotation a bit more flexible.