Trek needs to be completely redone if it's going to be any good. Needs:

- Good, non-campy plots
It would be a good idea for plots to place much less emphasis on special effects!

- Well thought out, non-humanoid aliens

- Better main characters

- Better thought out technology
For example, the Enterprise's central computer would just be a very fast (and rather specialized) one, with no artificial intelligence; phasers would be replaced with electrical and projectile weapons; and warp drive would only work at STL speeds (a different mode of FTL travel would be needed).

In other words, it would have to become Babylon 5 minus the supernatural stuff.