Bea Smith is NOT dead!
First and foremost the cliffhanger ending of Bea laying on the ground in a pool of blood is not simply to have viewers wonder for ten months if she is dead to only confirm in season 5 that she is dead. The reason why they did that is to keep viewers interested in the show. As well on Twitter when someone was behaving as though Bea was dead, Foxtel's (verified Foxtel's) tweet was word for word 'Or is she?... We'll find out next year...' That is really all the confirmation I need. Furthermore people have been shot in the head at point blank and survived, shot multiple times and survived, stabbed more times than Bea, been in impossible accidents and survived so I cannot say that she is definitely dead. I never heard any officials of Wentworth say Bea Smith is dead and not returning so until I physically see something official I will not believe that she is dead.
That said, the network has truly achieved its goal of creating buzz and holding the interest of viewers for another ten months (Game of Thrones by the way did not need to do this. It is fitting the way characters die. Wentworth on the other hand garnered a different reaction). While the show is doing well, I think they want to see how invested people really are in Danielle Cormack's character so I believe with this little experiment that they have gotten their answer. It's a form of market research and they wanted to see how killing Bea would sit with fans. As for Kate Jenkinson's interview, I don't believe her. She is part of the game.
P.S. If my research has not been thorough, please let me know if there is something definite out there that I missed.