4) If you don't buy back your army in the castle, it won't increase in size the following week, but will replenish up to the normal growth rate. This might be a feature to encourage players to always buy back their armies.
That's exactly why it was implemented – to prevent you from ignoring everything and then buying tons of soldiers. Either you have an economy that can support buying the entire army, or you shouldn't build/buy the entire army. With a well-developed hero, you won't need to buy troops so often when clearing the map of neutral creatures.
телами павших устлана земля.
В последний раз с противником сразившись,
сбежал герой о поражении отчаянно трубя.
Победоносной поступью шагая,
над полем брани вырос силуэт.
Склонился Серафим собратьев созывая,
в последний раз над ним сияет Божий свет.
Победой Ангелов сегодня бой окончен,
увы но тем боям конца и края нет.
Когда же миром будет люд доволен?
Ведь "Не Убий" твердит Святой Завет!