49ers mailbag: What’s biggest thing that must improve in 2025?

SANTA CLARA — I’m making my list and checking it twice with all the 49ers fans’ questions in our social media mailbox. This mailbag may not be so nice:

What’s the biggest thing we need to improve on this offseason? (@rymacd22)

They must recharge themselves mentally, physically, and emotionally – areas in which one veteran told me he’s absolutely drained, with three games to go. From a roster perspective, I’ll respectfully disagree with Nick Bosa (not the aforementioned veteran) and...