FWIW: I friggin’ love the implementation of militias in Planetfall. It’s not the weirdly chunky free defenses of Civ V – they require some investment and maintenance – but they’re also absolutely relevant without being insurmountable later.
Also, man, I just adore the balance Triumph achieved with sieges in Planetfall. Fun bonuses, disposable militia, and favorable terrain for the defenders but not with the hard “bring fliers or wall-busters” dependency of AoW3. So good.