So you're idea of success is a bowl game but a 2 and 3 win season is absolutely unacceptable? That's a ridiculous set of standards.
I think we will be a bowl team next year, however, 6 wins being a good year isn't good enough for me. For me, next should have been an up year where we maybe win 9 games or so.
To say there's no reason to expect improvement next year really goes against anything football related. Defensively, we will lose two guys who started and both will be replaced by JUCOs that have come in the last two years. Not only do you have LBers that will naturally get better due to age, but they will all make large jumps due to the fact they are so young. You have two guys at safety who were a sophomore and a freshman, one of which was DFOY. Your one corner who everyone calls average because they don't know what they are talking about was a 2nd team All Conference player. You return every other corner that saw meaningful time, bring a few guys off redshirt and add a couple more plus a JUCO. Everything defensively says better and maybe even a lot better.
Offensively you get the second year of a system, return all but two Olinemen, one of which will be difficult to replace. The other three come back. One won't be a freshmen playing at 280. One won't be hurt. Another comes off a season ending injury. Yet another won't be in his first year playing due to the lack of bodies. Oh, and they seem to have competent coaching since they improved throughout the year. You lose Bibbs. I would say that's the only guy you won't replace, however there are so many receivers on the roster that you can probably replace his production in the aggregate.
So, when you say nothing points toward improvement, you are completely wrong in terms of generally accepted indicators of the direction of a football team. I'm not saying we will absolutely win more games. We may not, but nothing indicates anything but improvement at this point.