Tennessee was a top-10 team more than half of the year, last year, though, even with those offensive deficiencies. You talk like they were hot garbage.
They lost Phillips, Nkamhoua, Key, Plavsic, and Edwards, none of which were the missing offensive key. They added Dilione, Knecht, Gainey, Estrella, Carr, Jefferson, and Phillips. On paper, that's an upgrade.
We have three 5th-year seniors, all of whom may start, and four juniors who will all play.
Sure, there are some questions, but the same can be said for every team out there. Every roster has seen some level of turnover. We are ranked by the media and coaches as a top-10 team. So while your concerns are noted, maybe it's time to accept the idea that maybe this team is a little better than you'd like to believe and not necessarily defined by last year's deficiencies. Turning over half your roster provides some currently unanswered questions, but also some potential solutions.
To me, the biggest key is one you didn't even mention, and that is Zakai's health and availability.