It might've been, but maybe not. If anything the fact that Striker was meant to replace Gipsy Danger kind've suggests that they were looking to steer away from that particular Jaeger's backstory. That's speculation on my part, but I think the fact that Striker Eureka was one of the most advanced Jaegers in the film and was designed to look "cold" and "arrogant" would've worked as a representative of the United States.
Well, yeah, in the final product that was the movie, Striker Eureka is very much a supporting character when compared to how the movie presents Gipsy Danger. But if the original intention was to make it the "hero Jaeger", can I at the very least see that much in its design.