What you get for $10Just like all things in this world, you get what you pay for. This is a $10 expansion (or $20 if you are not a subscriber) and you really do get $10 worth of content. This digital expansion is more like a bloated major patch. It doesn't come with all the regular things we're used to receiving in our MMO expansions, like new player races, fifty hours worth of play time in missions, and new classes. The Rise of the Hut Cartel expansion is one new planet, two separate story lines - one for Imperial and one for Republic - and a bunch of new missions. I was able to finish the story arc in two casual days of playing. If you are expecting this to compete with the expansions you may have experienced in WoW, Rift, and other MMOs, you will be disappointed. If you are expecting $10 worth of content, you will be satisfied.
Story linesAll eight classes have their own unique introduction to the main story line on the new plant, Makeb. After these introductory video cut scenes though, the story and missions are then the same for all Republic players and for all Imperial players. The re-play-ability is limited for players with multiple alts. BioWare tried to disguise the lack of variety by telling players that all their characters will have a unique experience but really, that is an overstatement. The only difference after that initial cut scene is what the NPCs refer to you as. The story on Makeb is not a continuation of your classes' main story.
The story also doesn't use your companions - they have nothing to say on any of the missions. Your companions do comment on things like the scenery though, but they have nothing more than a superficial role. It has been said in multiple interviews that class missions in SWTOR finish at 50 and that it is not cost effective for BioWare to extend with the same level of detail as in the first three Acts. So after playing through the first story on Makeb I tried it again on a second character. I found myself tabbing through identical blocks of voice acting to speed it up.