I don't think anyone is saying that the Bills are not a very good to great team. Top 3 in the AFC and top 5 in the NFL.
Josh and Diggs will get you 12 - 15 wins in the regular season.
The trouble is Inky and you know this, they were 1 and 1 in the playoff. Same as last year. The year before they were 2 and 1. When ever there is a 1 in the loss column in the playoff your team is not good enough. Playoff games are a war of attrition.
I believe that if the Bills team of 2 years ago would have had the O line, the D line and Bennett from the Super Bowl era they would have beaten KC in the Championship game and won the Super Bowl and last year they would have won in KC and probably would have beaten the Bengals. This year I think they would have besten the Bengals and probalby KC.
I am not as doom and gloom as many here. A few upgrades here and there, especially on both lines and the Bills will be much better and harder to beat in the playoff.