[eweise]

Too much functionality in your XYZ class is not generally the problem. Its the dependencies between the classes and the way the frameworks (looking at you spring and hibernate) can make it too easy to couple your code via transactions, ORM graphs, etc.

[UserIsUnused]

All modern ides analyse dependencies. Spagheti is usually built when there are too many people working on one project. Microservices is to scale people, no need for microservices when your company has very few employees.