Why the lack of underwater content?

Because underwater content is the absolute most horrible thing to ever exist in video games?

Because the intense illogicals of firing a blaster underwater or using any sword (normal or lightsaber) underwater is not worth the gain (what would the gain be anyway?).

Force lighting and telekinetic skills wouldn't work. The whole combat would be dmapened by the medium water... and most people agree, that the combat in SWTOR is already slow enough and doesn't need to be slowed down any further.

If however you are talking about just venturing underwater and then fighting in dry caverns or installations underwater, then it is nothing but a fancy scenery and fine.

Explain to me how the following abilities will work in an underwater or 3d setting, one that has no floor nearby.

-kolto packs, medical packs, kolto missile
-death from above
-orbital strike
-sweeping blasters
-Death Field
-Revivification
-any abilities i may have missed that are either a GT heal or GT damage

Who says they have to?

KOTOR 1 did it.

Yes, let's bring back that horrid environmental suit system. Worst part of that game.

Yes, let's bring back that horrid environmental suit system. Worst part of that game.

So your solution for abilities that cant work because there is no ground to target is basically "oh well". Awesome solution, i'll have to write that down on a notepad and store it in my circular file.

Modified blasters can be used underwater, most lightsaber work underwater.
Combat would be slower, yes, but its still logical in the sw universe.

A few battle come to mind:
Battle of Mon Calamari (Clone Wars)
Battle of Mon Calamari (Civil war)
Battle of Mon Calamari (Yuuzhan vong invasion)
Genocide on Dac (Legacy Era)