Even as you say he may be good further up the pitch your team will struggle as a whole. Successfully implemented false 9 teams often play high up the pitch with very calm and technical defense and midfield and high work rate players all over the pitch including false 9.
I think what you described is generally the standard any modern team aspires so /shrugs.
I don't think Wijnaldum, Henderson and Fabinho are especially technical and they were able to play it. We already are quite high up the pitch in attack and the focus shift towards being more technical under someone like Ten Hag.
Messi played false 9 for Barca, so I wouldn't say you need work rate from every single player in the system either. And do we really lack the work rate? We will play Sancho, Bruno, Elanga (new RW) + Fred, McT (new CM), DM next season. In my view that's a pretty energetic side.
I think the need to fit Ronaldo into the team at CF is a bigger driver than anything else in my view. If Ronaldo wasn't here and you-know-who was still around I think Rangnick would've given it a shot already.
Under pressure Bruno s passing itself very error prone. I just don't think it will work out for you with the players you currently have in defense,midfield and attack.
It's sort of true but I stick to my original statement. He has enough trickery to hold on to a ball and play the simple pass in counter attacking situations.
Awareness of what's going on around you is the most important thing for a false 9, so he will do fine. He already does quite well in tight spaces in forward areas. Give him the ball when he's in the hole (marked or not) with someone like Rashford making a quick run and he can find the outside of the foot pass to play him in.
Overall, granted that this is the biggest-if. If he receives the ball with back to goal, CB breathing down his neck, it's unclear if he can do a good job.
Bruno has the knack in arriving late in box and occupy empty space in it to score. That's best attribute he has.If he has time and space he is super assister for your team s attacking play too. I don't think rangnick want to compromise that huge plus for your team with this false 9 concept.
Isn't that the primary thing a false 9 does too? You won't have him sniffing around in the box all the time, he'll still be receiving the ball between the lines in attack and either looking to play runners in or play it out wide and arrive in the box at the right time.