The OP said he was giving his thoughts on the draft, not the draft picks. Any analysis of the draft should include how you used your draft capital. In this case, the most valuable draft asset was used to acquire a #1 WR. Was it a good move to use all of that draft capital to get Diggs? The OP answers that question as part of his "thoughts on the draft."
Btw, based on published trade charts, if you assume next year's R4 = R5 this year, it adds no more than 70 points to their R1 pick which gets them to pick 20, not 18. Well played by Beane.