Ahsoka's personality starting in S5 has changed drastically from the last time she had a major role, which was in the Slave arc and "A Friend in Need". To change that quickly seems unrealistic, but then again it seems unrealistic that anyone would go from bratty at 14 to soooo mature in three years or less, especially when they're hanging out with the biggest brat in the galaxy, Anakin Skywalker. It also seems jarring that the dark side I saw in her during the first three seasons, culminating in an actual dark side turn on Mortis (I know, poison), especially when she's hanging out with Mr Dark Side, Anakin Skywalker. Ironically, it seems that giving Ahsoka a master she has to babysit has matured her, instead of giving Anakin a padawan maturing him, as the Council intended. Just my opinion.