i found a work around for this issue, go to displacement and add a height feature. no need to add any maps or change any settings. the wireframe should immediately pop in once you add the height under displacement.
We do plan to add more post effects at some point, exactly what they will be or when is hard to say. Its a minor priority at this point with no specific plans to add it back in. Just out of curiousity, what was your main use for this feature in TB1?
Thats an interesting idea, I will add it to the suggestion list here. Thanks! Sorry, but the debug render modes have not yet been added back in to Toolbag 2. Unfortunately we do not support particles of any sort at this time. If we do add particle support, it will like be sometime in the more distant future.