I agree that accidentally right-clicking your charged JD in the middle of doing things is annoying as hell, but I still think directionally based blind jumps are useful when you are being attacked and need to GTFO quickly. Basically an emergency "oh shit" jump. Though I do think that there needs to be a large random element when it comes to blind jumps because when you have a waypoint set your jump computer automatically makes the warp calculations for that waypoint (or for a midpoint if the waypoint is out of range), but without that there's not telling where you'll end up. "Traveling through hyperspace ain't like dusting crops", to quote a certain infamous scruffy-looking nerf-herder.
Perhaps when you pull a blind jump you appear at a random sector that is between 0.5 and 1.5 of your jump range and within a cone of space offset 30 degrees from your heading when you jump. Of course this makes blind jumping inherently more risky in the sense that there are a lot of places you could end up, you could "fly through a star or bounce too close to a [black hole], and that'd end your trip real quick."