This is quite an awesome buff imo, and a very well thought and good change for our snaring needs.Improved Hamstring now reduces the global cooldown on Hamstring by 0.5/1 seconds in addition to its current effects.
It allows us to quickly apply our root for 5 seconds within 1 second. Also since it can be dodge/parried its nice to just keep trying real quick until it lands.
Also if you wanted to play as a melee peeler, being able to quickly apply this to multiple targets will be awesome.
Also it increases our damage. While we may need to continue to apply much more often due to 8 second duration, the short cooldown is not a big sacrifice in damage anymore.
Now, just fix charge jumping!