Quoted from John_I:They are into production and have shipped hundreds of games. Its not like they can address these issues in software. Short of a really expensive board handout and making owners swap dozens of connectors, these issues will are here to stay. Maybe late production WoZ could see changes or if not hopefully The Hobbit...
I think you're right, the issues are here to stay for the games that have shipped already. However, if these issues are as serious as the OP claims they are for operators putting the games on location then JJP will need to do something about them. Why continue to build games with the same hardware if there are known problems? The design of the games must continue to evolve.
I'm mean, let's take the connectors for example. Maybe I'm being naive but let's say they've got a few boxes of them in the factory. A decision is made, they're shipped back to the supplier so someone else can use them and they get some of the Gottlieb sys3 connectors as the op has suggested instead. They could be fitting them to games from next week and going forward.