Yeah, pretty much. There's some give and take on everything, but for the most part a guy is going to need to be at least in the ballpark of that stuff to be serviceable. Velocity and GB:FB count too, but come second to everything else.
Take this guy for example...his vR ranged from 54-57 during his prime (he got hurt a lot so his ratings bounced around), which is very bad for a LHSP, since they are generally going to face > 3/4 righties. But he managed a very respectable career ERA of 4.05 because he had three pitches in the 80's. But if he vR was down around 40-45, he likely would have gotten shellacked.
whatifsports.com/HBD/Pages/Popups/PlayerProfile.aspx
But also keep in mind that if a guy meets all of those criteria, he's not necessarily good, just OK enough to use. This guy fits all of the criteria by the slimmest of margins and has a career ERA of 4.92, albeit in a smallish 157 IP sample. Nevertheless, I use him as a Mop-up/Long B as the last resort in my bullpen.
whatifsports.com/HBD/Pages/Popups/PlayerProfile.aspx
So don't be afraid to aim high. At the end of the day, take what you can get but you gotta reach for the stars to build a top notch pitching staff.