Gjensen! Yes, they need work...have you seen my Dorkings?! I'm very glad you're working with these. They appear t have good height. They show a lot of thigh. The heads look right. The earlobes look right. They look rather light in colr, but I'm assuming that's sun bleaching from before the molt. You'll have to repost post molt.
My first thought in discussing a need, considering all of these strong qualities, is width of feather. That's where that certain je ne sais quoi look of finish comes from. If you could start selecting for strong width of feather, it would give them that presence.
Do you weigh them? I've found that rare breeds consistently need selection for fleshing.
They do need work, but if you walked my yard, you might notice that most of what I need is here. For the most part height is not an issue. I will know better in the spring, when the younger birds are farther along. They do have some meat on their thighs. I like that, and important for a breed like this.
There is so much to consider right now, feather width has not even been a consideration. Sorry, not this generation. A lot of culls to get something I would even start with. I admire birds with good wide feathers of fine quality. That Black Hamburg Walt posted still comes to mind. I liked that bird.
I have weighed some. That cock bird is 7lbs 7oz, or was when I weighed him. Standard weight is eight lbs. I do not like how they grow and flesh out. They mature early, but takes them some time to get where they should be. They do not flesh out as they should. Let's say that.
These are birds, that are better in person. They have a way about them. The males stand proud, and are not intimidated by much. The hens are smart and sassy.