yes you can only get splash and if you cross them together it will even be lighter than they are..splash to splash makes very light.The orange is a huge problem.Hatcheries have used gold laced to make the red and you will always have the orange issue which is not even close to the correct color. The red your striving for is the red in my aviator any lighter than that is too light. They will continue to fill out but Hatcheries have also put Rocks in the Wyandotte's and that is where the tails are coming from..they should never have a Rock tail but a very open tail which is hard even among the breeder Wyandotte's that is why we(BLRW breeders) are still having a hard time getting correct lacing and type on the same bird...yours also need work in lacing but anytime your working with Hatchery stock that is what they have and you need to make it better.
Now,I like the fact the hens have color and are not mostly splash, so I would work with the hens and sell the rooster and replace him with a good colored well bodied rooster then keep the best pullets