Thornton will stay because on game day things don't always go to plan and T-bird is someone who is mutable and in the kind of form that could prove crucial in a cut-throat final.
With Waite having pulled up sore again, it is becoming less & less likely that we will see him again this season, therefore Thornton's position in the side is virtually guaranteed come September.
Although not as effective as Waite in the forward line, Thornton is our next best option & offers the same footy smarts that Waite offers.