No one argues against the improvements of a IDC over Molex, unless the goal is quick and fast. That is the only significant advantage.
After 30 years of technical work, my lesson tells me that I never have needed to replace a connector again after getting rid of the IDCs and replacing them with Molex. The only exceptions are Jones plugs which are repairable, and several other edge connectors that are specialized for manufacturer boardsets. Those connectors need other methods for optimal reliability.
People can make their own judgement.
I am not going into depth describing electrical connectivity calculations based on contact surface area for a classic PinSide TLDR. It does not matter if the game is home use or commercial use. Fix it right the first time, and a person never needs to do it again.
Some things you cannot teach in a text post on the internet, you learn how to do it with practice, such as crimpimg, a person can just "point the way". The male header pin issue was still not directly potentially addressed, so replacing the connector still may not solve the problem with colder solder joints.
I wish the owner the best in repairing the game, as the skills are important in becoming a contented, non-frustrated hobbyist especially early on to prevent people quiting.
If you wish to learn more go to PinWiki, where many technicians write articles for repair, which we add details frequently.
This may be of great use in the future.