I sort of agree about the bows. There are indeed builds that are about weapon speed, they involve rapid fire, or strafe, both of which will be effected by your weapon speed. But it kinda breaks down as follows:
2h Bow- Medium Damage and Medium Speed
2h xBox- Heavy Damage and Slow Speed
1h xBow- Low Damage and Fast Speed.
When I say low damage though its not so low that its not worth it, but it is lower than the 2h bow.
As far as passives is concerned, your right, there isn't another Passive that would cause using sharpshooter to hinder you. But there are passives that add more consistent and better benefits. I do think that there is a better chance that crit will be better now. It all depends on what the DR ends up being and what the cap ends up being. If the cap is low say around 55-65% then its going to hurt you unless it by passes the cap, no reason to think that it will though, but its possible. If the cap is high, say around 75% then there is absolutely no reason to use it at all. Honestly I think the cap will be no higher than 50%, otherwise crit just becomes too powerful. I do see this passive being good as you gather gear, and maybe in Inferno. With the amount of kiting you'll be doing in later difficulties, it could very well reach pretty high numbers, if you are spending say 4 seconds kiting, then an attack, then 4 seconds then an attack. It could be really good. It could also balance out when your not at optimal gear, but will loose value once you hit crit cap.
I would replace it with one of the following:
Thrill of the Hunt
Cull the Weak
Thrill of the hunt will be extremely useful when kiting, being able to stun an enemy on command will be amazing.
Vengeance will depend on your play style. I will be using it depending on health globe drop rate. If they are dropping at least 1 off 10 monsters, it will be great as a health/resource stash. You can save the globes until you've burned through your hatred, and then pick them up for a quick boost in a pinch. So it depends on if this sort of play is something that interests you.
Tactical Advantage is really good because it lines up with Smoke Screen perfect, and allows you to essentially double the ground you can cover to get away.
Cull the Weak is perhaps the only passive that would be all out better, because you'll want to keep as many enemies slowed as possible, and with this they will then be taking more damage. A 20% increase to damage against slowed enemies will probably work out to be better than the sharpshooter depending on the above factors.
Yeah Grenadier is good for your build no doubt, the actual uses of the passive complement your build, I actually find it really odd that they would add in an effect like that, but IDK, I'm sure some people will like it, it does have a certain use, if your about to have killed off a group of monsters of something, and then die, it will kill them, but I'd rather spend more time being alive, then thinking it's ok if I die, cause they will too.
This will likely be my inferno build. But it's likely to change as well as skills are changed and once I actually get there and see what works and what doesn't:http://us.battle.net/d3/en/calculator/demon-hunter#ebSlQi!bcZ!ZZaaYc
It's designed to have optimal control, as well as good AoE damage. It does lack a bit on Single Target, but I like it more than my other builds. I also have a build that centers around Rapid Fire, and using Multishot as my AoE.
But this build has a very good resource management system. You'll notice that Multishot will restore discipline, ES will provide Hatred, but I use it for the slow mostly, this may change to bola shot depending on how the Obsidian rune ends up working (if it can stun all the damaged targets, cool, if not then I'm sticking with ES most likely.) But it also has the regen from Smoke Screen. So basically I can use my abilities to provide me the resource I need the most. Looking at it, it looks like Rain of Vengeance got a boost in power I don't remember it doing so much damage. Most likely I'll change it to Golden rune, but I try not to use golden runes in my builds because they will be rare, and expensive on the AH.
This is my other build that I may use, its centered around using up lots of Hatred for which ever kind of damage I need, while kiting to gather mobs into groups, and blasting with RoV. I don't really like it though because I feel like it will be hatred starved, and I don't think that Multishot will do enough damage to replace RoV. But we'll have to see, cause I don't really like the idea of having two skills that do the same thing. http://us.battle.net/d3/en/calculator/demon-hunter#XlbkQU!dUZ!aaZZYZ