No, the matketplace version stays the same until marketplace has an update. If you want the latest development, you have to do it 'the old way'. Use our installer (only) and download the development version.
That's correct. We often can't use the default MSFS systems, since bringing this plane to realism affords many special parameters and calculations (in short terms). Neofly is not the only external addon affected. We can give the "new' LVARs to any developer who is interested. We are also discussing (trying out), if it is possible to provide standard LVARs additionally. But we"re not sure right now if this will work.