Not really, just trying to understand where you start. It appears that more often than not you are starting with main elements of a piece of music rather than intro's. You're experience/skill now facilitates complete pieces of music, but not all the time. If I'm not mistaken this supports my tip of working on a main idea rather than an intro? True, the length 16, 8, 32, whatever can be variable.
I've found that 16 bars is enough to understand if an idea is going to work. If its getting boring after 16 bars and interest can't be added with fx, variation etc. then its highly unlikely that it will work for a full track. Since EDM has a certain degree of monotony in it if i make a decision that a main idea is not going to work I'm factoring in a certain amount of monotony in the decision.
Does this make sense?