They cut a planet. They cut several sidequests short. GOTO's plotline doesn't even resolve.
None of your crew has any sort of resolution after you leave for Malachor V in the base game.
Glitches everywhere. Atris enclave is still one of the easiest places in videogames to get bugged at.
A ton of weapon and item drops that are only obtainable by glitching your character to max level so that the loot table is updated to make it possible.
And so much cut dialogue it could pretty much make another game.
Hope true, but there are games fsr, far more bugged.