Summoners War: Chronicles

Hi,
there's this bug with the 5-star tickets — basically, you can't open them and a message appears saying "in preparation."
As for the constellations, they are nice, but they're way too overpowered for some classes like mages and warriors, while DPS summoners are really struggling to take down anything.
Regarding the 204 monster pieces needed to max one out, I don't agree with that — at this point, why not just increase the monster connection slots by another 5 instead?