Hi Jan,
Don’t know if you’ve received your response from Steinberg… but we’re basically SOL.
Took three business days to be told I ordered the, “incorrect upgrade”. 
If I have a license to run HALion Sonic 2 (Absolute VSTi Collection +), why in the world would it not quality for an upgrade path to HALion 6… when the standalone version of HALion Sonic 2 does?
I already own all the things in Absolutely VSTi Collection 3… with the exception of The Grand.
I don’t need The Grand… and didn’t want to pay the extra $100.
With discount, the full version of HALion 6 is about the same cost (to me) as the Absolute 3 upgrade.
The reality for me and others in the situation… is that we have no real upgrade path.
I know we’ll not be the last customers in this situation.
Steinberg should clarify this on the website…