TrueUnderDawgGaming has been coming out with some videos recently. His newest installment shows off Cassie's strings while he gives his detailed impression of her playstyle in MK11.
He gives some insight on the character that hasn't been touched on yet. So, I suggest if you want a heads up on what you'll be getting yourselves into, I'd give it a look!
And of course, It wouldn't be a JTCircus thread without the mandatory frame data spreadsheet:
New Video Shows in Depth Look at Cassie's Strings and Frame Data