I feel Neha is not arrogant in general but she is extremely moody and impulsive.
Her visit to Dixits leaving everything behind was also a spontaneous act of her impulsive mind.
She should have at least spoken to her mom or brother before taking such a big step. But as usual she has a habit of taking decision in haste first and then regret later on.
We have seen her kind and welcoming gesture for Sona. Its just not a good time to talk to her.She just left her house and is completely unaware of her journey ahead so her reactions are obvious.
I seriously have no complaints from Neha as she is living the life she never imagined.
But Ishwari using Neha's helplessness and situation to barge into Dev's bedroom or to distract him from his married life by creating a priority list for him is wrong.