Please point me to the 'legitimate speculation'-part in Ptrop's 'dumbing it down' as a response to StarTrek1701's view that Abrams and Co (presumably) made Star Trek more accessible to the average (general) movie goer.
"Arrogant" and "assumption" generally don't go together anyway.
"Arrogant" is an objective descriptive term. It describes the person being described, directly.
"Assumption," BY DEFINITION, isn't about the person being described as having made the assumption, though.
There are "ill-informed" assumptions. There are mistaken assumptions. There are correct assumptions. But, since you almost never make assumptions about yourself... it's nearly impossible for an assumption to be "arrogant."
If you think he's making assumptions which are derogatory... then they are not "arrogant" assumptions, they are DEROGATORY assumptions.
I, personally, think PTrope's position is quite reasonable. Of course, you won't be surprised to hear that, I'm sure. I find nothing either "arrogant" NOR "derogatory" about his perspective, though it seems you do think he's somehow being "derogatory" towards other people by virtue of him, personally, not LIKING what he's being given, and having the audacity to actually say so.
His criticisms, on this particular topic, are much as my own are. We both find the claims that "the original design would never work" to be NONSENSICAL on every level. There is no evidence of any kind to support such a claim, and plenty of logical arguments which cast at least SOME doubt on the claim.
The only way to find out if "the original design would work" would be to actually put it to the test. Now... that hasn't been done on the "big screen" but it HAS been done on the small screen a couple of times in recent years (for TOS-R and for "In A Mirror Darkly"). And in both of those cases, it's been very well-received.
So, there's a dearth of evidence either way, but the evidence which IS available tends to disprove the "it would never work" argument. And there is ZERO actual evidence in the opposite direction. There is OPINION, sure... purely individual and anecdotal in nature... but no evidence.