To answer the original question, my guess is that they think that Kaaya has more potential to be QB3 behind Luck and Brissett than Walker does. It is not costing them much to carry him into Training Camp in 2018 to see.
As for a potential transition in to a 4-3 defense with 2017 personnel:
NT = Hankins, Woods, Stewart
UT = Anderson, Ridgeway, Hunt
DE = Sheard, ??
DE = Basham, ??
SLB = Simon, Mingo
MLB = Walker, George
WLB = Bostic, ??
CB1 = Melvin, Desir
CB2 = Wilson, Moore
NCB = Hairston, Milton
FS = Hooker, Butler, Green
SS = Geathers, Farley
Pass covering MLB, play making/tackling fool WLB and pass rushing DEs are the weakness of the roster in a 4-3.
Huh? Not much of a change from our weaknesses in a 3-4! Imagine that.
Walk Worthy,
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Thad
The future is so bright; I gotta triple up!
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