how can we be sure we are not going to be screwed like XCR once did.
Because the "genius devs of Lisk" only win if Lisk is a success. And Lisk will only be a success if it avoids the management problems that befell Crypti XCR. Since Lisk is effectively a palace coup against weak Crypti management, it's a good bet these Lisk devs aren't going to make those same mistakes again.