LOL, I'm going through the same thing right now.
Half the battle is knowing/being told you've written too much. Sometimes you can feel like you're trying to paint a picture, which is right, but if you take one pass of the script, scaling back, you'll realize what needs to be cut.
"The Rock walks out, sweat dripping from his brow, taking in the crowd for a moment at the top of the ramp before sauntering towards the ring, basking in the energy of the supporting crowd. He climbs up to the ring, pausing before stepping between the ropes and walking to the corner, climbing the turnbuckle and raising a fist in the air"
Could/should be:
"The Rock walks out, sweating, taking in the crowd as he saunters towards the ring, before he steps between the ropes, climbs the far corner turnbuckle and raises a fist in the air"
A friend of mine told me once that I write well, but it's a script, not a novel, and I should be careful to know the difference.
This is exactly what I'm talking about. I think what I'd be best doing is writing out the way I am and then just revisiting the whole thing, fresh pair of eyes, with a screenplay eye for detail and scale the shyt back. Refine it. I'm comfortable with the structure (I think). It's the style. I've read a couple of screenplays the last couple of days and notice the one thing that hooks me in is the subtle and snappy wording. Short, concise, to the point and it keeps me hooked in and before I know it I've read a bunch of pages. That seems to be the real art of a good script. One that keeps your attention with few words.