Raul
The L-flyes are not a heavy or taxing movement.
The exercise is there to strengthen my rotator-cuffs which I consider important.
I personally prefer dips for triceps - I keep my legs straight & body upright to focus on them.
But close-grip presses is another great movement for triceps which I will alternate with dips when I plateau with that movement.
I agree with you about dropping a set or two if I'm not recovering/seeing good progress - good point