If your wood trim is starting to rot, you should get it repaired as soon as possible, as this could lead to water leaking in and creating more serious damage. Hire a home service pro to help repair cracks, holes or loose trims at home.
We wanted to install new shower arms to hang bathroom stuff from but we ended up spending a lot of time and reinstalling the old arms and just adding new shower heads to them (I could replace the shower heads...