@"Screw you I can judge what I want!"
You just can't fairly judge it that way. I'm not making that up, I'm just stating that you would be coming to false conclusions if you judged the demos as if they were finished pieces. Well sure, I could say you have an ugly face while only having seen your DTF avatar, but that doesn't make it a valid claim in any respect.
@"John remembers differently and sees facts in a different light"
Okay all of these are reasons he might not hold any negativity about the subject, but none of it changes what actually did happen. If he remembers less meddling than there was, that doesn't mean there
was less meddling.
@"Mike is arrogant and other people have opinions too"
Changes made to compositions are not corrupting if they are made and the artist genuinely agrees with them. Anyone on the outside could tell the artist as many suggestions as they feel and not corrupt the artist's vision as long as the artist still has the power of discriminating which ones he wants and doesn't. The moment the outside force has some sort of monetary power that allows them to
force their "suggestion" into the work whether the artist approves or not, the vision becomes that much corrupted.
@"Other bands have producers and it's a good thing"
No amount of how often record labels have power over the artist's work makes it fair. That's about as valid as saying "well everyone was drinking so it was okay". However, if you think it's a good thing that the producers got involved for some reason other than that- you should understand what you are saying. Producing on its own is not an art. It's just a practical means by which art is put across. If a producer is part of the composing or arranging process, than he would just be doubling as a composer or arranger. As in he is a producer and also an artist. Which is totally cool, but you should recognize it that way. In order to keep the integrity of the artistic direction, Dream Theater would have to invite the producer's artistic vision into the song, just as they would a new member on any other instrument.
To an extent you're right, but I think JP goes further than that, in that he whitewashes it so as to remove any and all controversy and negativity, for fear that this is somehow gonna harm the band. Not saying that every bit of dirty laundry needs to be aired, but we're talking about pressures against the band as a whole, not internal struggles here.
This is a good point, I definitely agree that's part of it too. I actually admire Mike's honesty, but I think it is often unnecessarily offered, and often to the wrong people (fans who don't need to be brought in to the argument).