Most of the people they hire don't work directly for the model company. They work for some other company that contracts with the model company to do a job. The model company has no control over when the actual work gets done, because they are independent companies or independent contractors. So the sculptor may say he will sculpt those 20 poses in 20 weeks and then his muse does not hit him and he takes 40 weeks, or 120 weeks or never. And time is wasted. Or his sculpts miss an important pocket flap, drawstring, ammo pouch and they have to be done over. Or his sculpts won't come out of a mold. This is a critical element the sculpts have limitations due to the mold making process, the completed figures have to be able to be ejected from the mold. Some sculptors just don't get this and make great sculpts that could never be produced in plastic without being 9 part figures.
So when people ask the question, when will this product be available, the answer is no one really knows. The best anyone can do is give an estimate based on how long each step should take, given the products place in the line up. Companies can only do a few models at a time because of the expense of each step and the limited number of sculptors, mold makers, etc who can do this type of work. Most of this work is very precise and even a tiny error results in figures that are way too tall, or too short, or goofy poses, or historically incorrect.
The sculptors are artists who no little or nothing about history or the military. They don't know how a soldier holds a rifle, how a tribesman holds a spear. They are not wargamers and don't know that we want the new Germans to be compatible with the HaT set or the Revell set; they probably never even heard of those other companies. Then just to make it more difficult, most of the work is done in China or Eastern Europe and the folks there don't speak English. And Imex, HaT and Pegasus are American companies, based in the US. So imagine how hard it is to direct these processes from 6,000 miles away by phone and email with someone who does not speak your language as their primary language.
Some big companies like Italeri and Revell probably do have it easier because the people they use are more local, but even then we see a more uneven result because they are not run by hobbyists who care about the army men they way we do here a Bunker Talk.
Oh, and did I mention all these new Pegasus products will be out soon? They are all past the pre-production stage, so it should not be too much longer before they are in stores. Next year the T-34/76 will join the Pegasus T-34/85 on the shelves.