In my opinion, outside of AAs even, one of the most important changes made to both crusaders was related to casting times. Across the board they were reduced. That eliminates a ton of interrupts that previously plagued us if we tried to use our slower casting abilities. Many of our damage abilities were also reworked and their damage values raised. We had lagged behind in particular when RoK came out. And yes, several AA lines were reworked and improved. All in all, it was overdue.
To the OP. Solo SKs were always pretty good (although that was diminished in RoK content). Since we have seen some love with TSO it should only be better now. I just purchased a 2nd account and let my kids each create a character to run with me. One of them chose SK and I had no need or desire to push them in any other direction as I thought it was a fine choice for a 1st character (it was mine) as well as a solo/duo character. As far as I can tell, the heal amounts on our abilities really didn't change much.