Looking at the Redskins rankings, they are about middle of the road in both offense and defense. I acknowledge stats don't always tell the whole story though. (The Packers, for example, often don't look like a top 10 rushing team)
Total defense: 24th
Rushing defense: 26th
Pass defense: 24th
Points: 17th
Total offense: 17th
Rushing offense: 23rd
Pass offense: 12th
Points: 14th
Looking their schedule, I was surprised at how it was pretty easy overall. They played 3 good teams in the Jets, Patriots, and Panthers and lost by at least 14 in each game. They have won four in a row, but against average or worse teams.
Kirk Cousins has played really well lately, with over 100 rating in each of the past 6 games. Him and the passing game is their strength.
Overall, the Redskins are what I'd expect out of a 9-7 team who won a bad division, maybe slightly above average. They are not a playoff team playing in any other division (expect the even worse AFC South).
The Raiders team we beat on the road a few weeks ago is better than the Redskins. I'd put the Redskins at 7-9 or worse, like the Raiders, with the Raiders' schedule.
Packers win 27-18.