I would be extremely surprised if it costs 25€ after ~3 years of development.
It doest take 3 years with a full time team on it. The size of the team working on it fluctuate during this period, it not like if they are make a game from scratch. All network and core gameplay where already inplace. An other thin to keep in mind, if they want to growup they need to keep have new players, having a complete package to higt can stop new player to buy it. Do not forget that they put in place micro transaction (arx). The best way to keep have income is to keep growing the player base by having an affordable price for the complete game.