Even if you ignore all that Big Ben sounds like he's contemplating his future and PIT seems anything but completely all-in on Antonio Brown in the long term. For that matter Bell himself may be in a different offense in the future. He has been able to average nearly 5ypc in that offense but if he's in another offense does he get that ypc AND get the entire workload like he does now? There aren't many teams that use RB's like that anymore. This might be the best time to unload before the question marks are obvious to everyone about the future of this offense.
Way too many moving parts even in the short term for me. I would cash out unless I thought my team was a favorite to win the title this season. But I will admit I weigh the "dummy" factor in more heavily than most FF people do. Based on some of his quotes after his last suspension was announced he just sounds like a guy that still doesn't get it to me. It seems kind of rare for guys like that to wake up one morning and start making much, much better decisions than they have demonstrated in the past. Great talent. Hard worker. Those will never be in question... but the league is full of talented guys that work hard AND don't get busted for pot every other year.
The "dummy" factor you speak of is one of the reasons I was pondering this this last week. I'm not necessarily calling him a dummy, but two strikes is two strikes, and I think the next violation would be 10 games. Overcoming 2 games, or 3 games, especially at the beginning of a season is do-able, but 10 games, especially if it comes mid-season, could be a killer.
With regards to Ben & Antonio, I think it will turn out to be much ado about nothing. Ben has a reputation as a "drama queen," which the pondering his future comments seem to support, but in the same interview where he made those comments, he made a number of comments about what he and the team needed to do for next year. The overall tone of the interview wasn't one of a guy who was going to retire, but one throwaway comment got all the attention. With regards to Brown, I'm sure some of his teammates, coaches, fans, etc could do without the penalties, facebook live, pouting, etc, but he's the best WR in the game. They aren't going to get rid of him, unless the contract becomes a problem (which is a possibility).
The big issue is money. Bell will be a FA, Brown has one more year, but was reportedly promised that the Steelers would address his contract this off-season. If they get Brown a long-term extension, it's going to be for big money. Because of his restructuring before last season, Brown's cap hit in 2016 was $11.9 million. The average yearly salary for the top-5 WRs in 2016 (excluding Alshon Jeffrey who played under the tag) was slightly over $14M. Have to assume any Brown contract will have to be in that range, although they could spread out the cap hit, so it's less than the full $14M in 2017.
Bell will want a big contract, but even if he gets tagged, he will count $12.4 million against the cap. His cap hit in 2016 was $1.2 million.
So, assuming deals or the tag are worked out/used on Brown & Bell, the Steelers might not have a lot of money left over. I don't know much about the other Steeler FAs, but they need to keep their O-line together, improve their #2 WR spot (unless they trust Bryant will get re-instated/stay clean) & improve their D.