Saying "ALL" of the versions are molasses is a bit unfair in my opinion. There are tons of users that use the program without issue. With that being said I'm not saying the program isn't without it's shortcomings or bugs, many of which are being worked on in attempt to minimize this. IF there is something you would like to see potentially done or added to MRB please follow the proper mediums and/or create a fork from the publicly available source and make changes then submit a PR so it can be reviewed/implemented.
Thank you
Personal Note: I do specifically recall you stating you were stuck using 2.6.0.1 due to a non .NET 2.0 port, there is a guide which was graciously drafted up by one of the homecoming GMs regarding MacOS. Feel free to follow it for using newer versions.