Exactly, and on a larger map, the army bonus is naturally greater, and therefore will have a bigger impact later in the game.
However, on a larger map, the bonus weakens because the opponent already has more than one full wave of their own troops, which are much more effective than Necropolis reinforcements.
Горящие реки сходили с ума, пытаясь остаться водой,
Земля пропустила коварный удар, раскрывшись на шаге вперёд,
Взлетел разъярённым драконом Огонь и понял, что тоже умрёт...