It would be nice not having to export to PDF. AEC's smaller size than sending multiple PDFs, to get them a complete plan (right now mine are getting up to 50+ MBs which can't be emailed to most). Could maybe allow for individual O2C selection for viewing. Maybe some of measure tools could be used so they can measure to scale? Being able to view a model in 3D space, especially with Datacad's future plans. Maybe allow for different pen tables to be loaded? GTV/MSP support. I'm sure only the basics would be included, as to not compete with LT, but that could be left up to whoever programmed it