there is another usage of ね:

ね is sometimes used in a non-sentence-final position to draw the hearer's attention to something or to confirm that the hearer has understood what has been said up to that point. ね is typically used in this manner in telephone conversations.

• (3)
• もしもし、今晩ね、銀座で飲んでから帰るからね、十一時半頃になるよ。
• Literally: Hello, tonight, OK? I go home after drinking in Ginza, you understand?, so I'll be home around 11:30.
  
  So I think the "drawing attention" usage should be considered a separate usage from the "sentence ending particle ね"