I think you are right re Riaola, I might have read somewhere United have banished him too. It seems we have a good relationship with him, he seems to like Moshiri and I do wonder if the u-turn was really the work of Lukaku on his own and not Riaola as subsequent evidence has emerged. It looks like Wenger and Fonseca are heavily linked, one is a very well connected manager (arguably the most connected in this country) and the other's agent is Mendes. So bringing Riaola and Mendes in is a big statement for Moshiri. I also think re Wenger, it will only cement talk of Usmanov's involvement.
I do think we will see a re-emergence of the different strategies to recruitment that we briefly saw in the first summer but little came of. When we went heavily after Witsel, Mata and Koulibaly but ultimately couldn't quite get them, I suspect with further involvement of Riaola, Moshiri (and more likely his people at board level) and any of Mendes, Wenger and/or Usmanov that approach may be dusted off and brought out again. We will have had consecutive top half finishes, and spent a tonne of money, so people will see we are serious, agents will view us more favourably and Moshiri may have his people involved more to influence strategy.
I think Brands will likely fulfil the role alongside that that we hoped Walsh would do. Scout of value signings, set the budgets, negotiate properly, buy players ready for the first team and manage the coaching staff. A lot will be taking lads like Lozano/Ziyech, IE the best players in Holland, possibly some young talents from leagues like Germany and also some occasional young protege's like he did in Holland from areas like South America. I do think this aspect of the job will be a lot less than with Dutch clubs though, but will help raise funds both in an actual sense but also for accounting purposes for the club.
Walsh if he's kept on I suspect will do scouting. I know most want him gone but I'm happy for him to scout as he seems to do ok with this (lads like Lookman, Vlasic and DCL are good buys for me). I think his focus will entirely be on young players who can add value. It's clear he can't close deals, plan, manage people and develop an overall strategy. I suspect he will continue to aggressively target players aged 16-19 for the younger sides and also the occasional domestic talent he sees.
In theory it all works well but will need to be properly balanced by a strong CEO and a competent DOF (Which Brands is).
As for Klaassen, I agree he will be involved more and he should be. Look at his record of games he's played this season, his points per game, even from a small sample is good. Yes he struggled a bit, but given the rubbish we've seen since, he absolutely deserves his chance.