Nice figures and layout there.

I can imagine that there is a little lead sergeant somewhere screaming at your guys "Don't bunch up! Spread out!" though, as there would typically be around 4-7m between men (so 1"/25mm+ apart on-table).
With 15mm you are pretty much playing at the correct ground scale for CoC and as sonicReducer says, it's good to have the space. We are used to seeing closely packed troops crammed onto multi-bases for rules that use very compacted ground scales, so it can seem odd to have a platoon spread over some 100-200m of real estate like they were in the real world.