@BS Kitbasher
The original question was pretty vague. Probably intentionally. A question like that is going to have a lot of interpretations and generate all kinds of answers. No one here knows what data WGA is trying to pull from this question. Who they should actually partner with? Whose lines they should copy/emulate/ develop analogies? Heck, the question might have been a throw away with the only intent to draw persons to the forum.
That being said you are missing two benefits of partnering with someone else to produce historical miniatures.
1. Brand recognition. Some manufacturers are already the "Gold" standard for historical gamers. They know they are going to get well researched, well proportioned, good looking models. They will snatch up a Brand X plastic kit made by WGA. They may turn up their nose, or more likely, never consider a kit made by WGA. "Aren't they spin off of that those other guys? Don't they make sci-fi toys?"
2. Other historical manufacturers have a distinctive and recognizable style that the advocate likes. He would just like to see it in plastic.
Additionally, several posters (myself included) ARE deliberately advocating for kits they would like to see made. Whether in conjunction with Victoria Miniatures or alone I would love to see all female Soviet Infantry in Space! Sighting Victoria Miniatues is a deliberate attempt to show how to do it right, and showing that is a product with demonstrated demand.
Same with Bad Squiddo. Partner or don't. I would just like to see M43 uniform WW2 female Infantry.
https://wargamesatlantic.com/community/xenforum/topic/49886/suggestions-for-new-soviet-kits
Does WGA need to partner with Kromlech to make 1939 Polish Infantry? No. I just want Polish 1939 Infantry. There is a certain satisfaction in partnering with a Polish company to do it though.