SWTOR 7.0 Patch notes are here

The Renown system, designed to give players some sort of progression goal to work towards even after hitting the level cap, is gone with no replacement, as are social points. Social points were a bit of a pain in the rear, since they weren't Legacy-wide, but the replacement relies on Group Finder achievements - except 7.0 disabled Group Finder for characters below the level cap.

The Dark vs Light system has also been removed, meaning missions and non-Diplomacy crew skills no longer award Light Side or Dark Side points - you can only progress on the morality system path with conversations or the Diplomacy crew skill, which will make it much harder to max out either if you haven't already.

Daily and Weekly missions are now also on a Weekly rotating basis. While still available if you walk over to the quest giver, whichever missions aren't in the current rotation will provide decreased rewards and won't be available via quick access - previously one could immediately travel to any planet on the Heroic Mission list.

Most of the rewards for completing your weekly Conquest have also been removed or reduced - Solid Resource Matrixes are no longer awarded, and credit rewards have been greatly reduced in what BioWare claims is an attempt to curtail inflation.

These are just some of the notable removals of content from SWTOR as part of 7.0 that have resulted in major fan backlash, but aren't the full extent of the issues the game is currently facing. We're eager to see how BioWare will respond to this controversy.