The only modification the Luftwaffe made to their Tonka fleets was to re-fuel them. I think this is the German response to UAV development as they probably want to grow their own expertise in the field, rather like they did with Taurus and Iris-T.
A whole aircraft programme is ambitious though, but while the UK piles money into housebuilding, failing to provide apprenticeships for future UK brickies, the Luftwaffe will be churning aerospace engineers through university and TechnischeSchule to support this programme. And all funded by their 1.5% of GDP NATO contribution.