I don't think anything definitive can be predicted yet about eventual draft position.
A lot will hinge on the combine, where the teams interview QBs, and put them through the "grueler" of bombarding them with offensive concept information, and then seeing how well they process it quickly and can white board the concepts back to the offensive coaches.
I expect that McCord will excel there, and in the interviews, and that those "wins" -- in conjunction with his prolific numbers -- will push him up draft boards.
You also don't know how the desperation factor might work in the draft, as well. For example, a team like Cleveland might not want to take a QB at the top of the first round, but probably will at the top of the 2nd. Teams might also move back into the end of the first round to snag a QB prospect. Usually, more than 2 QBs go in the first, because it is such a premium position of need.
All of which could move other guys up. Let's just say for example that Dart goes at the end of the first. Well, now there's another guy off the board, and teams that still need QBs. So a guy like McCord's draft position could get pushed up.
I still think that in the end, he'll shift above bigger names like Ewers / Milroe, because his capabilities are superior to theirs. And I say that without a trace of bias -- he's a better NFL prospect, with far superior passing skills to either of those two.