I watched all four of the Washington Potatoes game highlights.
The secondary is a legit dump truck and I don't mean that in a complimentary way. Not just talent-wise but the number of big-plays given up due to players being out-of-position put the blame squarely on the coaching staff.
Speaking of, they never seemed to adjust after taking the lead in the first two games, blowing fairly decent sized advantages.
Keenum, of course, fumbled his way onto 3 of those and Haskins just looked flat-out lost in their most recent whopper against the Giants throwing 3 picks of his own. Thanks to the duo, Washington currently sits at #25 in the TO margins rankings with a -0.8 differential (not surprisingly, NE and Bears lead the pack with a +1.5):
https://www.teamrankings.com/nfl/stat/turnover-margin-per-game
Otherwise, the Potatoes have a big issue running the ball. It ranked #30 in DVOA after week 3. Can't imagine going up any higher after generating mere 55 yards on 17 carries (although they were chasing the Giants from the get-go).
Gruden, obviously sitting on the hottest seat right now, said after the NYG game that he'll put whoever will give the team "the best chance to win". This means Haskins may not play this Sunday and we may see Keenum again.