This is a rant about personal preference, but I hate that the base shooting mechanic relies on spending a second action on aimed fire. 1e assumed quick fire and aiming doubled your hit chances. 2e assumed aimed fire and halved your hit chances for faster shooting. Whichever route is taken, sound game design should default to a single action providing the base task resolution mechanic. Dropping two die types because you don't spend the obligate second action to aim is not useful to the game, but using this as the penalty for attempting to shoot as a fast action rather than a slow one is perfectly acceptable. (This, of course, would have to limit all ranged combat on the turn to fast actions, otherwise it's a free bonus attack.)
In terms of success chances, this game already takes a system similar to Savage Worlds and then makes things harder. Needing sixes to hit isn't going to be negatively affected by not requiring a second action to use the base mechanics.