For now, I'd say it's best if people just not consider Arcade Sim, and focus on making their MFME layouts look and play good in MFME The higher the resolution the better, and also, when there are layouts where it stutters in MFME due to a lot of blended lamps, they are welcome for Arcade Sim as it doesn't have that problem - it's nicer to have complete set of blended lamps.
The conversion process is still very 'unfinished' and there'll be a lot more iterations. The extraction stage is horrible, it requires the keyboard and mouse not to be used, while my code remote controls the PC to operate MFME to extract. That process sometimes goes wrong, and can start other programs, delete files from desktop etc - it's in no way something I would release!
I did address similar queries a bit back in a comment or two around this area of the thread:
Then to build the machines, you'd need fully synced Unity, at the exact stage I'm at, requiring source sync, or a project that is currently running with outside dependencies, so I'd need to run Perforce over some kind of leased line to have the bandwidth - not all the projects folder is required, but I'd say it'd be at least a third:
Basically, it's not going to happen at this stage, due to a whole raft of technical and time limitations. If I could work on this full time, it's something that could be explored I guess, but it would stop all other progress... so the current workflow is we have we have for now.
Plus of course, MFME is not really 3d, so features such as this dice:
Or this recessed trail board:
http://retroamusements.co.uk/Pyramid.jpg-for-web-normal.jpg
Need doing afterwards...
It's a complex issue, but I already figured that completely suspending the progress for maybe years to attempt to make a standalone converter from MFME to AS is a non-starter unfortunately.
There may in future be some changes to this situation, potentially some form of 'cloud-based' conversion server (you you'd uploaded the MFME files archive, and it could attempt to converts and provide a video preview... though I really couldn't say if that would be worth creating/what benefits etc.