My latest team had this interesting x v y:
Gawn and Rowell (ie. Walsh of 2020, maybe ??)
vs
NN and Walsh (Walsh of 2019
)
In 2018, NN averaged 102 up to the bye and missed one match. At this point in his career he was already having his TOG managed, so it sat ~60%. So probably a realistic estimate is 100. If I think Walsh goes at 100 and Rowell at 70, with Gawn at 125 then perhaps you're ahead on points with option B.
Trade into Gawn after the bye and you avoid a R13 mess?