I have the same question about GL-MT300N-V2 (Mango). Should we expect that 4.3.7 will become available for online upgrade down the road? Or is this going to be manual only due to the major changes from 3.x to 4.x?
Edit: found another thread, it looks like the decision not to auto update was permanent due to the changes in features available, unexpected need to reconfigure, etc.