Game edition should be upgradable

The standard game edition should be upgradable to gold or ultra by paying the price difference instead of paying the full price. Some of us can't afford paying for the same game twice, and some of us are not comfortable of paying 100 euros for a game before trying it. This unfairness also applies to players that received the game as a gift or as part of a promotion. Furthermore, the value of buying edition DLC separately is worse, and the ultramarines champion pack is exclusive to the ultra edition which is extremely unfair and at least in my case it is keeping me for further suporting the developer.