I'm sure the dragons will be killable at an early level stage, therefore easy.
I can't imagine Bethesda making the dragons so hard that kids have to play for more than 4 hours before they can kill one.
...unless they want dragons to feel epic, in the truest sense of the word. Bethesda markets their games as being truly epic, which will in no way be accomplished by poking a dragon to death the second yo step out of the prison, or wherever you come from in this game. Oblivion gates were that way, and people complained heavily. The devs have learned from their mistakes, that much we already know. I don't want to be capable of killing dragons until several hours in, and not without prior planning and tactics. Dragons should by no means be
easy.