In the first page on this thread, the initial posters were making positive reviews about him until someone expressed concern about his technique, and everyone lapped it up. It is an overstated aspect of striker's games. You want your players to be very secure with the ball, but strikers should get much more leeway unless they are completely out of their depth, considering that they rarely get much touches on the ball outside the final third unless the team is built around them getting on the ball.
Lukaku's major shortcomings IMO is his workrate and movement. He rarely makes the runs across defenders, doesn't put his body to good use, and doesn't do much off the ball. His poor technical ability specifically, is grossly overstated. He is inconsistent more than poor, and his all-round technique on the ball would be completely acceptable if he was a hard worker capable of scoring the amount of goals he has proven to be capable of scoring.
This Nunez guy do seem to have question marks over the amount of security he offers with the ball - most strikers do honestly, even Ronaldo has been for a while now, but considering that he puts in plenty of running when his team has the ball, and when the other team has the ball, I'd say he would be completely fine here if he could hit the target every other game.
There are more than a few ways to play football, and you can comfortably play a possession game without involving the striker too much - there are nine other outfield players. For me pace, power, movement, workrate, strength in duels, and ball striking are more important for a striker.
Going by what I've seen so far, Ten Hag do make good use of his wingers and full backs for creativity and in the build-up. With Sancho and potentially Antony on the other wing, you don't need another cook if the manager knows what he is doing. If this lad is no worse than Lukaku for example in the build up, then he'd be perfectly fine - if he could score goals of course.