Making the postseason by any means would be a success.
But I don't think Loomis is measuring the team strictly by season outcome. I think they see this as Year 1 of 'Being recovered from the Sean Payton hangover.'
Carmichael gone. Kubiak in Year 1 of a new offense. (I can't see the season ending with Kubiak leaving.) That and loyalty make Dennis Allen here for at least two more seasons, unless the bottom drops out.
1st year of really reigning themselves in on future cap commitments
Year 2 of Carr. Plus an active effort this preseason to develop multiple possible future QBs.
Year 1 of Fuaga and 'are you or for real or not' Trevor Penning.
I think Loomis wants to see some identity and chemistry develop on offense. Where there is pressure on Allen is that the Defensive Guru Allen needs to get the defense need to step up. You aint great unless you are filling the stat sheet with sacks, turnovers, and stops. Too much hype on them right now.
All of this will take alot of the regular season to play out. Win games and they buy time and breathing room. Lose games, and the swarm of FIRE ERRYBODY will grow loud, paired with the frustration that Loomis sees himself in Year 1 of a new project, and will not care what you think.