I'd like to suggest a few features that, if added to Plugin Manager, would make for a much better tool.
1. Search - This would really help in troubleshooting plugins. Maybe by plugin name, date installed, Company, ect.
2. New Plugin Highlighter - The most recently added plugins could be highlighted, sort of like windows does in Start>Programs, when new programs are installed. This would make adding new plugins to layouts, much faster.
3. Color code for 32/64bit plugins - This is available in the media browser section, but would also really help in the Plugin Manager.