hover shot would be fine if we didnt get interrupted from moving. it might actually be amusing at that point, but that's not how it's going to work.
Just played with it a little, it doesn't seem to interrupt as much as you think.. a nicely created and perfectly timed Auto-Strafing addon can make it work really well..
It also works on Weapon Skills..
Although, it may be tough to make such a program, as clientside vs serverside detection of you stopping may cause some confusion. It would have to be paced out not on every single Ranged Attack, rather every WS to give your DPS a little more boost..