What isometric view? ACE doesn't use isometric view by default. Now if you mean the default view in ACE, that's what you're stuck with unless you get someone to overwrite the entire system via many many plug-ins (and you'd also need custom art as well to work with the new view).
Edit: Ok, now you updated with more info. Disregard my post then as it no longer applies.
Working on a Premium version of my minimap plugin that will have advanced functionalities such as drawing a Terrain map based completely on the users tilesets, whatever they may be, and drawing minimap radar icons automatically based on texture of the event the note is applied to.