What if ... Starfleet Didn't Have Shields?

In the ever popular game of comparing sci-fi franchises to each other, one unique aspect of Star Trek compared to others, like "Battlestar Galactica" and, to an extent, "Star Wars," is the presence of shields on starships during combat. The trio imagines a Trek universe where shields don't exist (or are not as effective), and ships show a little more wear and tear after they log a few star miles (or kilometers). How would our favorite "hero" ships and space stations look every season? Would there need to be new title sequences every year? Join us as we imagine how Starfleet combat doctrine and ship construction would change in this new imagined universe.