So as title states this is a legitimate question, not a flame-war nor a whining post.

 

With that said, my alt is level 42 has leveled up in pvp as such he had enough comms to purchase four lightsabers each containing an enhancement with 17 expertise previously for use at level 42.

 

I have equiped/stripped the four enhancements and put them into custom gear (oranges) giving my character a total of 68 expertise equaling a 2.18% mitigation/buff in wz's.

 

Is this really all that worth it for 2.18% or would I be better served just running a different enhancement altogether?

Its worth it. I had 5% damage/heal boost at level 46.

Nothing else to buy with comms if you only do PVP.

After looking at the other various options I think you are right.

Minor secondary stat additions and if you can build to 5% what-the-hey I'll stick with it.

More expertise is always better in PvP, because it's basically a fixed-rate (may be mistaken on this at higher values), across-the-board improvement. Less damage taken, more dealt, more healing done=happiness