I’m sorry but in the context of this thread ‘implemented large parts…’ has little weight and sounds no better than a statement/assertion such as the earlier
It likely would just as easily still not be LoRaWAN, though I am glad you have provided more information and the fact that it
Sounds promising, but TinyLoRa works for others so I would like to know e.g. whilst working for you does it cause problems for others such as triggering the download avalanche discussed and described earlier…do you have access to a gw? Does it indicate node misbehaviour? If not then sounds promising 
and I await reports back from other users with their assessments of if plays nicely with V3 
please keep posting & help us fill in the blanks… 