If you want him to play leftback and stick to being a left back, then it goes against what you said about being versatile. He needs a defined role and we need a defined system. The debate about where is different, but I probably agree he is not a player you hand the keys to the offence and say "go be versatile." But you do say go harass and beat people on the wings and then cut it back to the plethora of finishers we have or make room for yourself because you are not a bad finisher yourself. That's your role.
And David and Larin are similar, they are not versatile players who create their own chances, they both can be good in transition but most often they are beholden to service. We don't have an amazing 10 to unlock defences and give them that service, instead you look for a system that provides it. Fonseca's at Lille is an example, but if you listen to him speak about his coaching (he has been linked with West Ham) it is a defined system that requires pressing.
I would appreciate the Herdman quote about the World Cup and "pressing". My impression was he let the players play more attacking because they wanted to, I don't remember much about pressing. I could be wrong.
Again, respectfully ,your last couple of sentences, to me, misunderstand what gegenpress is.
If you have a defence you are confident in, like a number of English managers, you clog your final third and invited the pressure and, win the ball back there, then look to counter.
In Ragnick/Klopp/Marsch ideal, you really never want the ball getting to your defence. You are trying to get the ball back much higher, where are our good athletic players are - Davies, David, Buchanan, Kone - if he had a coach that could instill that in him - and Eustaquio who can at least run all day and can pick a pass.
The defence will look to jump in offensively and protect breaks - we will have a much more athletic group than the World Cup , I am willing to bet - but you shouldn't need, as much, players whose strength is dealing with sustained pressure, which are what I would say would be the faults of the inexperienced group we might send out.
So if we have good athletic forwards and maybe a suspect tactical defence, the Marsch system is a great fit to use the strength we have and try to lessen the prominence of the weakness.
It has all that.
What is usually missing is Concacaf youth qualifiers. Women match info is improving but often don't have player background info & match analytics and at times don't have the lineups.
That may be it, not a big enough tournament for a ball to be official.
Looking at this, I see the CPL does use Derbystar, which is what VFC expected to play with at Spruce Groves.
https://northerntribune.ca/canadian-premier-league-match-ball-2024-2025/