Request info about Dorico Pro 2

DORICO PRO 2 Is not an update to DORICO, Is a new program, It is thus ? Those who bought DORICO should pay the entire package of DORICO PRO 2?

Those who bought Dorico 1 can upgrade to Dorico Pro 2 for 99€ or something — same price for everyone.

But yes, Dorico 2 is technically a separate program that can run alongside Dorico 1.

That is correct. However, the upgrade will run on the same e-licenser or usb-licenser that was used for Dorico 1.x
Those who do not own Dorico 1.x will have to pay for the whole package as you wrote. Normal fee around 560€, crossgrades and educational prices available. Hope it helps!