If you keep using logic you'll upset people around here...
Panthers gain nothing from releasing Burton, so long as he's still getting development there's no harm in him staying there.
Alternatively, he comes over and gets 20 games or so under his belt with Flanagan and begins to form combinations.
For Burton to be in blue and white in 2021 it'd either involve sending Lewis / Wakeham the other way and paying for them, or, taking Mansour / Whare at full freight.
Out of the two options, I'd love to see Lewis in Panthers gear, Burton in the Doggies 6 jersey and one of our development players upgraded to the top 30.