Starlink satellites are launched in groups and initially orbit in a line close together.
Spreading communication satellites evenly in a sphere is neither desirable nor possible due to uneven human population distribution and technical constraints.
Satellites in low earth orbit (LEO) orbit at different altitudes and velocities to avoid collisions and ensure efficient signal transmission.
Constant maintenance is required to account for real-world departures from ideal Keplerian conditions and to avoid satellite collisions.