Kiper isn't great or anything, but all the mockers do the things he does. If you simply post the most accurate, obvious mock you can think of this early in the process, it doesn't give you a lot to offer your readers through the rest of the process. Its just something to have a little fun with, some draft stuff to read early on.
I do think Mcshay and Mayock are better, but its a slight margin, not a huge one. Kiper gets a lot right too.
As for the specific complaints, it could go either way. Allen is my #1 reciever right now, but I love Hopkins, Woods played hurt last year and Patterson and Huter are both intriguing raw talents. Allen also didn't produce a ton last year(though this is probably circumstantial).
Werner does have some JJ Watt in him. High motor, plus pass rusher who can also defend the run, very good hands and very good at getting his hands up in passing lanes to bat down balls. He's the 4-3 DE version of him, but he definitely has similarities.
IMO, 3 QBs will go top 10 minimally. Could even be 4 or 5 if Buffalo reaches for Nassib or someone falls in love with Barkley. He's wrong there. I also hate that he keeps saying Albert could be kicked inside to guard. Its not happening. He can get LT money from someone and KC has good young OGs in ALlen and Asamoah.