You bring us some interesting questions, that I assumed were not an issue since Skid Steers have been around from some time. From an operator's perspective front mounted tools make sense, but then there is the roll over. My experience with machines is many years of landscaping and excavating with an industrial Ford tractor with ag type tires. The box scraper, that we called hyteco, had a blade that was designed to work forward and backwards. So I was leveling dirt in both directions and never had a problem with tire marks. It may well of been because I invariably finished on the forward storke, but this same result could be obtained by a front mounted box scraper on a TC that is capable of finishing in reverse. There were actually many times when using the box scraper in reverse was preferred like knocking down and spreading piles of topsoil.
Speaking of working in reverse, one thing that always bugged me was trencher attachments, but now there is at lease one company that is making front mounted trenchers that are designed to be pushed rather than pulled. I too am interested in a 3 pt hitch, but more so to have tools on both ends and the option to pull tools that don't require constant attention. The one thing I want to avoid is watching where I'm going in one direction, while montoring the tool in another. I believe head spinning is okay for girl watching, but inefficient and often painful on those sun up to sun down work days.
jmf