5: Too much bugs (and if I say that, taking into account how much I love having bugs to abuse, then you know there's too much)
6: Ui is... horrible. Too many pretty lights, too few useful things, map is a "don't-understand-what-the-hell-is-going-on-here" thing, etc etc
7: The devs in charge are known to never finish anything, so say goodbye to half of the features
And so, this is basically how to kill something successful, or it would be if the community didn't go back to the original.
Take this into account when making a sequel, don't do things the community will hate and that contradict the original, and if the game has no competence, don't say "BeTtEr GrApHiCs ThAn ThE cOmPeTeNcE!".