-Tenn 45 is a good ship, but for your playstyle Penn 43 might be better, as it is easier to speed capped. One advantage Tenn 45 has though is gun arcs; it can fire all guns almost directly forward/backward.
-I hope you will have a scout in your setup
-Looking long term, I assume you would want to look beyond bb2 level. For that, you need 10 support sailors. (no AA/HH as you said) Most people would use 6 Eng and 4 Rep. At bb2 Level, 6 Eng and 2 Rep might be too unbalanced, as you would get diminishing returns from the engines. 5 and 3 may be better. Try both and see which one is better. At the end, you will need to level all 10 supports, though.
-Note that the bb2 14'' triples have terrible spread. Alternatively, you can mount dual 16 Mk2s on the Tenn 45 (another advantage over Penn 43). The 16 duals has better spread, slightly more range, but higher angle (40 vs. 30). Again, try both and see which one you like better. Personally, I cannot stand the 14 triples.
-Not that you could mount useful AA on US bb1s (except for Guam), but having HH on secondary mounts might make you more useful in Nevada and Tenn 41. Something to think about.
-Elite potential for BO is a waste. You need to trim crew at higher levels for your sight anyway, and you will only have 9 repair. 14 potential / 11 repair or even 13 /11 much better. You need every repair you can get!
-Good luck and have fun with your grind!