On the Broncos’ opening possession of the season, Russell Wilson’s first three passes and first two completions went to Andrew Beck. At the time, it felt like a good omen for the Broncos’ tight ends. Beck was at the bottom of the positional depth chart, after all, and hadn’t had a reception in three years. Would the tight ends, headlined by third-year pro Albert Okwuegbunam, be a core feature of the Broncos’ new offense with Wilson at the helm? Three weeks later, that hasn’t been the case. Okwuegbunam has six catches for 45 yards on 10 targets, while Eric Saubert…