Idea is simple. Just like Pods that land on ground and start growing through stages - mobs that spawn on map would grow over stages over a certain time if they are not killed. If there was no player activity in a certain area - mobs have fully mutated into strongest beasts and you would surely have a hard time and need to team up or look for support to deal with it. This way you would not know what to expect at any area you enter, how dangerous it may be over there, what has changed since last player entering there. Re-spawned mobs could be weak and squishy but could grow into some kind of elite mini-boss. If all re-spawned mobs happens to grow into beasts - well tough life , deal with it. Maintain the map area more often. Research part is simple to. As you progress in a game you would scan with some kind of mini-drone every new mob you find. Since mobs would have growth stages you would have to scan it at every state go gather full knowledge of its life and biological structure. This could give you extra bonuses on mobs you have fully researched. It may be more biological mass loot, may me 'mutogen serum' amount you can extract from it or even damage you can deal on it - you get the idea. I remember developers had a concept of information sharing in game through some interconnection between players, obviously for money. This would be fascinating ways of progression especially into lands you have never been at and want to have guarantee of survival or economical investment for a price. What are your thoughts ?