It is more than listed, but... well jeesh, the idea was always to create these highly detailed aircraft and have it all mesh together. Now we're paying extra to get the compatability. We kinda payed for that by buying a DCS product in the first place.
That said, development needs funding, so... again, if the initial price had been $80,- I would still have bought it, the extra cost just comes as a bit of a shock at this point, completely unexpected.
It's nice though. Haven't tested it yet, but the AI improvements alone would mean wingman, any AI unit, can actually be usefull now. And it does look rather nice.
Only gripes at this point are that they ditched the BS menu music and I'm stuck with English betty, but seems that can be modded.