The future's bright for next year. I think that the main cause of concern comes in 3-4 years, but so much will change by then! Let's enjoy what we just did, but also think about the next 1-2 years.
Our team shouldn't have a crazy amount of turnover in free agency. We should be able to sign the key guys and have replacements in place for those departing - Trent Brown for example perhaps. The secondary will remain excellent. Our DL will likely go through the biggest overhaul, but if we can keep Trey Flowers and the better or cheaper of Shelton/Brown we should be solid. LB core will be good AND we get Bentley back.
Offense shouldn't be too bad. OL will remain near the top regardless of Brown - we have Wynn in the back. The back end of the WR core will be subject to change, but if we're being serious here, they weren't really relevant for most of the playoffs. As long as we have Edelman, we have a good shot. The TE position will take the biggest hit, but we've shown in the past that we don't need a HoF-type TE to win games - this year and 2016 proved that. Hopefully we get a good replacement for Gronk and/or Allen. RB position should be just as strong next year w/ the development of Michel likely. Brady won't get any worse.
Remember to factor in basically the ENTIRE 2017 draft class coming back with a year of learning.
This includes Isaiah Wynn, Duke Dawson (basically...), JaWhaun Bentley, Braxton Berrios, Ryan Izzo, and Christian Sam. That by itself is a good group of added players!
Then factor in a 1st, 2nd, 2nd, 3rd, 3rd... and you get the drift. This isn't the 2018 Los Angeles Rams that mortgaged the future for 1-2 years of having a bunch of top-tier talent on the roster. This is a team that will be adding a LOT of young players next season and doesn't have a single position outside of TE that will be hurt this offseason. The future looks bright boys.
