I happen to be a believer with a caveat.
I personally felt for some time that the talent was better than what many experts had been claiming and with the right coaching and a reasonable draft, we could make a run at a winning record this season. The draft (although we won't see as much early results as I would have liked) was (at a minimum) good and the coaching overall has been far better than I could have hoped. We've been bitten by the injury bug and that may show very soon.
I believe that we got lucky with Green Bay giving up on the running game as early as they did and I worry every time we throw a two man defensive front (with two OLBs as DEs) on any down where the opponent can check to a run. That killed us against Dallas and will hurt us down the road, possibly many times. If we run primarily a three man front (once William's is back) on first and second downs, I will sleep a lot easier.
One huge concern is still the OL. The interior three are a problem (Feliciano and Glowinski are much worse than I expected) and there lack of competence has made it more difficult to assist Neal (who in time will be very good). This needs to be addressed this offseason.
I've believed for some time that with NFL caliber linemen and weapons, Jones can be a quality QB. I also have believed from day one that Barkley is a weapon that few teams ever possess. He needs to remain healthy. My gut tells me that both have the new regime reassessing how they will move forward as it is my guess that they initially had no plans on holding on to either for the entire season (would have traded Barkley for any reasonable offer and Jones for any offer).
With the schedule ahead, some improved health and some development from younger players, ten or eleven wins is a possibility this year.