This is a huge year for Emmanuel Sanders, he'll be a Restricted Free Agent after this season. Antonio Brown already has his contract, and Mike Wallace will be looking for his payday too.
If Sanders is able to have a big year, losing Wallace wouldn't be quite as devastating as it potentially will be if you know what I mean.
With Wallace already having 2 TD's and Brown clearly settled in as the other starter, who knows if Manny will be able to have anything close to 1,000 yds this year. He says that's his goal for this season, and if Ben throws for atleast 4K again then the chances are there. However, Roethlisberger is spreading the passes around each week so far and that's likely to continue in the future. Passing to 8-10 different targets each week doesn't allow you but a handful of chances to make big yards.
His best chance will be to get as many yards after the catch as he can because he's going to get a lot of the short to intermediate passes.