Where does a united approach to solving a problem in a church come from? Shared biblical vision. It's the only place. For sure you can have a shared organisational vision that produces results for organisational change, but if it isn’t supremacy-of-God-oriented then what you get is a building or a project or an adjustment to practice rather than kingdom growth.

Churches have some unique characteristics that may make change potentially more difficult than in other organisations:

they are voluntary associations
in many churches people have a right of say in decision-making who are not connected to gospel-vision or to the leadership. When the less spiritual fringe is allowed as much say as the spiritual, biblically driven core, it's a disaster
people have joined on the basis of something they find attractive and may not stay if anything challenges or changes that
it is impossible to incentivise change with remuneration. This is the major way almost every other organisation does it. We have to incentivise it differently
they will contain a variety of different views on stake-holding. Change will look different if your understanding of church is: (a) "I go to church because I like some aspect of it"; (b) "this is my church - and I will fight to keep it just as I like it"; (c) "this church is my community to with whom I further the gospel work of God's kingdom"
the congregation may be unclear about organisational goals, aims and structures. Usually more so than in a business
people think that everyone should have as much say as leaders, regardless of whether they are spiritual or spiritually gifted in discerning direction

We could sum these up as:

individual inertia: self-interest and self-perception about why I am in the church
structural inertia: externals and activities are perceived to be the essence that makes church attractive, rather than gospel vision
vision inertia: lack of clarity of God's purposes to bring himself glory and how the local congregation should run in those purposes
leader inertia: factors that make leaders unwilling or unable to lead

All of which are likely to demotivate change