Well there is a page suffix class for menu items which exists in joomla however this is on a content level ( articles ) and what we need is a higher hierarchy on page render. Starting from HTML tag to bottom so we can override or change anything on certain pages from looks to disabling certain class's etc.
You can see this feature when adding or editing menu items for articles, body class overriding is already being used by Gavick for overriding template options so we cant use that, otherwise it would of make this job quite easier. if Gavick can also implement this feature so we can override body class on item ids we can practically change anything , until then i think manual editing is the only way at the moment unless some one has better idea please do share ; )