I'am sorry to say you are missleading people with your statements. When you macro any skill it is clearly a huge and indeed noticeable dps loss.
What happens when you in fact decide to macro your main skills with your off GCD skills such as "Heavy Shot" with "Bloodletter" and obviously Windbite, venomous and straight shot aswell is that you take away the ability to que your next skill. With the delay the game already has unless you live in JP and play on a JP server, by losing the queuing of a skill which actually happens when you click the next GCD skill you want to do while it is on cooldown. Because of this, you will always have a significant delay compared to someone that can master it without any macros what so ever.
So for all you min-maxers, never during any circumstances do you use a macro for any skill on bard if you are looking for maxing it out, and this is not 1-2 dps we are talking about, more in the 10's to 20's or even more for that matter.
