Um, what? Surely whether or not your country becomes a free democracy that looks after its people is more important than colonial jollies abroad? I would consider putting imperial prowess above political reform to be "sacrificing the very future of their country", but then I'm more of a democrat than an imperialist - much like the Frankfurst Assembly.
I see your point, but I just can't look past the 1848 liberals saying "yes, Victoria as monarch would militarily secure our future, but it will forever condemn us to being a second rate state doing Britain's bidding". You could even draw a point out about this move sacrificing freedom for freedom, nationally to socially. As Zapata once said, "it's better to die on your feet than live on your knees". Handing the crown to Victoria would be certainly mean that Germany would be living on its knees under the highly Anglicised auspices of Victoria. Sure, there may be some who favour the move, but it's just too big of a gamble and I see it being too contentious considering that this is a "make the wrong decision and your great-great-great-great grandchildren will live to regret it" kind of thing.