Comment by teiferer

Seems like your organization is lacking structure and communication.

Where I work, the structure is such that most parts of the codebase have a team that is responsible for it and does the vast majority of changes there. If any "outsider" plans a change, they come talk to the team and coordinates.

And we also have strong intra-team communication. It's clear who is working on what and we have design reviews to agree on the "how" within the team.

It's rare that what you describe happens. 95% of the code reviews I do are without comments or only with minor suggestions for improvement. Mainly because we have developed a culture of talking to each other about major things beforehand and writing the code is really just the last step in the process. We also have developed a somewhat consistent style within the teams. Not necessarily across the teams, but that's ok.

TL;DR: It's certainly possible to do things better that what you are experiencing. It's a matter of structure, communication and culture.