I have noticed that in spite of this being an awesome manga, it's forum is generally empty so instead of starting a new thread for this, I will just write about it here.
Ok, so recently wendy was revealed to be a dragon slayer, which to some extent was expected considering grandines comments to igneel. Now, as the name dragon slayer would suggest, a dragon slayer is a warrior who, as proven by natsu when he fought luxus, is supposed to deal ideally with dragons.
Considering that, I find it extremely unusual that wendy is apparently largely incapable of fighting. Even if she was trained by a dragon, why would her magic be considered dragon slayer if she cannot fight? Her magic would seem to be the exact opposite of dragon slaying, she would seem to be a dragon healer if anything.
Also, from gasille, natsu and luxus we have seen basically the same attacks although adapted to their respective elements. For instance we have seen elemental roars, punches or spears. I would expect basically the same attacks from basically any dragon slayer at this point, so how would this be reflected on wendy? Would she be capable of slashing winds and tornadoes? What we have seen so far suggests she is not. So far we have only seen this:
http://www.onemanga.com/Fairy_Tail/141/09/
Maybe that healing technique is comparable to luxus, natsu's and gasille's own type of punches. If that's the case the maybe wendy's equivalent to a spear or roar are even more powerful healing techniques(yet that would contrast her dragon slayer title). It was also said wendy had supporting spells, so maybe her version of other DS techniques can make others stronger.
Now, another thing that bothers me is that wendy seems to have severe limitation on her magic, which is a significant difference from natsu, gazille and luxus. According to charles, it consumes way too much magic. In any case I find that weird because fatigue is not something which should get both of this responses from charle:
http://www.onemanga.com/Fairy_Tail/138/06/
http://mangahelpers.com/s/manganimetrixfansubmatfs/readonline/38591/14
Another thing I find disturbing about wendy is how old she seems to be. She seems to be about 10-12 years old. Considering the dragons disappeared 7 years ago, wendy must have learned her ancient, lost incredibly power magic when she was between 0-3/5 years old. That would be weird IMHO. Of course, if there is magic behind it, there could be something wrong with a DS age, considering that natsu and gazille were not able to cross that barrier in the luxus arc. Maybe the DS are really all over 80 years old.
What could be the result of overusing wendy's magic? And even if she did overuse it, could she not get better by eating air, her element, as natsu and gazille did when fighting each other?
So basically, what does it all mean? What is the deal with wendy? How does she slay a dragon? Maybe wendy as a dragon slayer has a different purpose from the more traditional DS. Or maybe she can fight, and is darn good at it, but she says she can't simply because her healing abilities are too overwhelmingly stronger than her fighting abilities.