I get what you are saying about intensity, Onomah has a very relaxed demeanour, it's just how he is, and there are times when you do want him to be a bit more dynamic, but sometimes it can be deceptive. But to say he won't get stuck in is wrong, I think defensively, he's actually better than Winks, especially when played in a more 4/6 type role, he positions himself better and will get a leg in and win the ball more than Winks, it's just that Winks tears about more than Onomah does and invariably looks busier.
It's like watching Pogba and Herrera say, you watch them and think Herrera's doing loads more than Pogba, then you look at the stats and you realise Pogba's touched the ball about 20 times more than Herrara, he just doesn't look as busy doing it.
It is a bit of an English or European thing I think....remember Hoddle being in and out of the England team and a Brazilian pro noting that if he was Brazilian they would have built their team around Hod.
Similar with Johnny Barnes, of course Liverpool understood what they had but for many he was a bit laid back...certainly hurt him for England