The free agency frenzy is over, but the Patriots’ roster-building process is far from over. New England did a good job plugging holes at wide receiver, tight end, and defensive line with key re-signings and veteran additions. But the offense still lacks explosive pass-catchers, a long-term answer at left tackle, and, most importantly, a franchise quarterback. Now that we have a clearer picture of the roster’s deficiencies ahead of next month’s draft, it’s time to take another shot at PFF’s mock draft simulator to address the Patriots’ remaining positions of need.