Why the change? Essentially, the developers found that based upon the size of the stronghold players were filling up the area too quickly, with a skewed ratio compared to the other possible locations. The change should be a positive one for the amount of space and for players who want to get more decorations; the downside will be felt primarily by players who had already unlocked bonuses and will need to fill up the Tatooine stronghold all over again.
Star Wars: The Old Republic just filled up too quickly? The developers think it did. A new patch is live on the test server, and in addition to balance changes for the Sith Sorcerer and the Jedi Sage, the patch greatly expands the number of hooks available on the Tatooine homestead.