First- The fact that I call an electronic MIDI orchestration a "mock-up" has absolutely nothing whatsoever to do with considering MIDI not a serious tool for composers. There is absolutely no contradiction here, other than whatever you want to fabricate to create such an argumentation. If I thought MIDI were not a serious tool for composers, I'd not be using a computer to compose with Finale and SONAR. As basic as putting 1+1 together.
Second- Part of my argument throughout, that seems to have rubbed you the wrong way, is that I firmly maintain that a MIDI mock-up cannot be, at least as of this date, compared in realism and ultimate quality of a final product to a real performance. And I explained in some detail why, no matter how much effort you would like to claim you put into mocking-up a piece, it will never sound as good as an actual quality real live performance. Some of the notions I mentioned are fairly simple to grasp, and understand why they are what they are. They are the reason why I don't fool myself pretending a MIDI mock-up is anything that it can not be, again, at least as of this date. And they are the reason why comparing a real (quality) symphonic orchestra performance to any computer-based MIDI mock-up is totally blasphemous.
If you think your compositions and electronic performances are the product you're comfortable producing and fulfill your stylistic expectations, that is your entire discretion. Attempts to dismiss and discredit other's opinions, specially when sound arguments are on the table, really take you not too far.
Last, I definitely feel this whole argumentation has contributed very little to the real reason for this thread to exist, so most certainly will let it regain its due course, from my end, at this point.
edited for typo