TwiggyDid you know that the whole skeleton of unreal engine was made by 1 guy alone?
Not all developers have synergy/chemistry, throwing more developers at a problem makes the development slower in most cases, especially if their experience, vision and mindset vary.
Chronic_At the same time, redoing the code of the game in a clean and comprehensive way would take so much time that I'm sure noone wants to do it
Eeeh, I wouldn't agree that it would take "too much" time, technical debt is always worth reducing but you won't be creating actual value for so much time, which displeases customers and/or management.