So effectively you think a guy you rate as a young gun will come to us to play VFL, and you failed to list who Wallis would actually replace. Especially as we would now have Myers as depth (the Sloane upgrade) and so Wallis and he would be fighting it out. Statistically the two are pretty similar this year, with Myers shading Wallis on clearances and D50 work, and Wallis shading Myers on clangers (less of them), tackles and I50 work (including goals). Given the concerns being expressed is for inside work, I'm not sure why Wallis is an upgrade on Myers, who by your argument is going to be in the VFL behind Sloane anyway.
It will be interesting to see if the team really clicks for the rest of the year if the club wants to change its stance on older players with regard to Sloane. Yes, he's outside that age band we're targeting. But a RFA like him or Gaff could be the final parts of the puzzle, and let the team challenge now while Hurley, Hooker and Belly are primed. You could also then keep our first round draft pick and use it on a tall, giving ourselves a pretty good depth in most areas.