OK. But I think the data is skewed by Dak's amazing 2016 season which was pretty much a dream season for him. Everything fell into place for him.
If you take out 2016 stats for Dak then you probably see what he really is. A very average QB.
This. I do not care about their stats over the 39 games and how they compare. I care about where they are at this point (3rd year as a starter). Have they improved or regressed. Many QB's have bad first seasons, the question is can they improve upon them. Dak had a dream first season, but that was two years ago. He needed to build on that.
That said here are Dak and Romo's stats from the first 7 games of their respective 3rd seasons (Not sure why we are comparing those two but I will use the OP's format):
Romo: 147 completions, 227 attempts, 64.76%, 1,887 yards (269.57pg), 8.31 YPA, 13 TD (1.86pg), 7 Ints (1.00pg), 99.3 rating, 7 sacks, 13 rush yards, 0 rush TDs
Dak: 128 completions, 206 attempts, 62.14%, 1,417 yards (202.43pg), 6.88 YPA, 8 TD (1.14pg), 4 Ints (.57pg), 87.4 rating, 23 sacks, 236 rush yards, 2 rush TDs
Compared to the OP's 39 game totals most of Romo's numbers above are improvements, and most of Dak's have regressed. I understand that no one player performs in a vacuum. There are many factors to this. Yes the players are different, but Romo's OC in his 3rd year was Garrett (and his offense). Despite this he was improving. Dak, (admittedly) for a myriad of reasons, is not showing that.
I just want to see improvement. That is all. Hopefully Cooper helps with that. Hopefully the new reorg on the O-line helps. He needs better play calling (no doubt). I am rooting for Dak, I am just skeptical. Until he improves his poise in the pocket, vision, mechanics, and footwork we have to put basically an all-star team around him (as you pointed out his rookie season had). I just don't think that is more realistic than replacing the QB. Here is to hoping Dak and Co. can improve.