I am no expert, but I will venture a few guesses for you to consider.

First, you say that many of the old English doubles had ejectors and that is true. This may be nothing more than the difference between fly fishing and bait casting.

Remember that the manufacturers you are discussing are German. I think the Germans take pride in their engineering, and they are going to make a gun that they deem will be the most trouble free and safe. With that mindset, they would go for extractors; the more utilitarian of the two options.

Second, it may just be a price point issue in manufacturing. Other than that, my experience has been that either way I need to get the gun off my shoulder to remove the hulls from a sxs and reload. My 2 cents worth adjusted for inflation...1.6333 cents!

You are the consumer and it is your choice.