Using a Heroic transport or going to/from my stronghold is causing my game to stop working. I've encountered this problem at least ten times, maybe more, since downloading 4.1. It doesn't always happen when activated, but when my game does crash, it's almost always when I'm fast traveling. Whether it be going from a planet to my stronghold, my stronghold to a planet, or from one planet's heroic to another planet, the game randomly crashes.

I had this issue today as well. The quickest fix is to switch instances on Tatooine.

There's a new tab called an Alliance tab. You now summon from that tab only. The companion character window is only for crafting.

On 12/25/2015, around 9:54 PM, I achieved level 20 with all four Alliance factions, went to the Commander Datapad, got the Cartel Coin achievements and legacy achievements. After getting the four speeders from the vendor, I logged off for the night. Logging in the next day, I checked my Legacy achievements, and noticed Hylo Visz's achievement for reaching rank 20 was "un-achieved." The other 3 factions achievements stayed completed, as well as the achievement for getting all four factions to rank 20.