Tennessee has only started one slapper, Kaitlin Parsons, this year, and she only started about half the games. The Weeklys moved away from relying on that several years ago. They turned Cailin Hannon from a slapper to a swing away hitter three years ago and she's become one of the more consistent performers offensively. Every team is going to have a couple of fast players that have that in their arsenal, but nobody uses it as a primary offense anymore.
As far as slugging, UT was 6th in the SEC in home runs, second in doubles and fourth in runs scored. Players with the ability to do these things was not the problem. Players' inability to do them in key situations was definitely the problem.
As for pitching, I would agree that it wasn't good enough behind Ashley Rogers. But relying on only her certainly wasn't the plan. Since you don't follow the recruiting side, you probably weren't aware that Callie Turner was one of the top pitchers in her class and was someone that most every SEC school wanted. She took a step back this year after a solid freshman campaign last year. Bailey McCachren and Anna Hazelwood were both Top 50 overall recruits in their classes and have proven to be vastly overrated. Some of that is coaching, some is evaluation, so you'd have a valid criticism there, but the idea that UT wanted to rely on one pitcher is not correct.