It's been posted already, but I agree with you 100%. Something feels different about this upcoming season and this new staff overall.
For me, it's knowing that we are a lot better than the product that we put on the field 2 years ago when we went 10-3, yet alone the 7-6 disaster that was on display last year. Diaz has eluded to this very fact as well.
We know what we are going to get from our defense. Now, knowing that our offense will/should cater to our playmakers and actually look like an modern day offense, internally, as fans, our optimism actually has a ton of merit and is not just based on blind "homerism" faith!