Perhaps thats because the pace of the players in Super League is not that different to the NRL.

...or maybe so far the ground has been too heavy to run that fast.

Yes, should have said with Mom that although he hasn't done much as yet. He seemed to do more against Cats and is probably slowly increasing his workload week by week.

Keeps him on his wing too. None of that dashing infield rubbish.

In defence I mean

I’ve noticed they often switch positions when were attacking, Ash then stays on the wing when defending

To give Mom 6/10 shows that some people just don't see what some players do.
His workrate, positioning and contact in defence was very good, but this doesn't necessarily catch the eye.
He's also getting judged on reputation as well.
A previous defensive weakness area for us has very much improved.
Regardless of the scores YEP give him, I'm pleased with what I've seen so far.
And as has been said, he will get better.

What I’m seeing is an athletic player with good skill and positioning. He can put a shot on in D too.

I’m sure when the grounds get better we’ll see more from him in attack. I think he’ll put Ash away for a few more this year, that is a very dangerous edge now.

Generally we’ve got about what we expected in the new players; and we are a better side than last year as a result.