Sadly I don't understand wie shareholders are sueing the game... Didn't they get the cash? Didn't they want to get this game out before Xmas. For me it would have been ok if they release it next year without stress and deliver it finished and with less problems.
No, they didn't get cash: CDP's share price has tanked. The blowback from this botched release has potentially cost investors significant amounts of money, and bear in mind that most of them would have had no more clue about the state of the game than gamers did. The only information most investors have to go on is what the company makes public, and if they believe CDPR deliberately misled them about the state of the game and therefore its potential for success, they can explore legal options to recoup the losses they may have made.