I think its a time for new discussion on the matter so I'll bring one forward Would you want dragons in your game? Why yes? Why not? How likely would you be to buy a pack with dragons in it? Summo...
Being late to the party I don't know what earlier The Sims iterations of dragons were like, but it seems that in The Sims 4 such awesome sounding things tend to get delivered as a big pile of meh.