Look, I agree that I think some of those guys are unlikely. I don't think Laverde is a midfielder, and I doubt Walla will be there for long stretches. But I absolutely think Langford is a midfielder (based on what I've seen at VFL level), and have no doubt Raz will eventually be 80% midfield. There are absolutely people on Blitz who disagree with both of us on Laverde, and think he's a great midfield prospect. So its not black and white.
I think this argument about "pure" mids, is kind of ridiculous. Looking at some of the best mids at the moment or last few years, Watson, Rockliff, Zorko, Gray, Ablett all played predominantly or exclusively forward at U18 level. Hell, did Zac play midfield? He certainly started with us up forward. Players are drafted on what they are expected to become, not what they are right now. Its why whoever generally wins the TAC B&F doesn't get drafted. Its why a heap of the highest possession mids at U18 level don't get drafted. Because they're not seen as being able to take it to the next level.
Its not like this is revisionism by the recruiting staff. On the day of the 2016 draft, Dodoro was describing every player taken as going into the midfield.
I also think you're building a strawman with the comments around having a hole in the midfield if we don't take pure midfielders. Hardly any draftees are ready to go straight into the midfield. Guys like SPP, Selwood, Oliver and Wines are exceptions, not the rule. Guys who come in and have an immediate impact are usually playing flanks - good examples for us are Heppel and Zerrett who both started their first two seasons outside the midfield. Planning for any draftee to impact next year is a foolish element to assume in an 18 year old kid - it can be the "cream" that they'll be ready, but should never be the goal. So I just don't see our 2017 drafting impacting our 2018 midfield. For better or worse, from a drafting point of view, our 2018 and 2019 midfield hopes are resting on the results of our 2012 to 2016 drafting.
Obviously a way around this is via trading/FA, which I am very open to for the right player(s).