In version 0.2.0 I removed the requirement to have the content: parameter if you have a unique title, which helps.
Right now, there isnāt the ability to do custom default titles, but I was planning on adding it. This is a little tricky because the plugin is telling Obsidian to treat each admonition type as a code block language (like javascript or mermaid), so it could collide with other languages and exhibit weird behavior.