What's wrong with having legendaries, Blue has 3. Legendary or not, they're still Pokemon. Zapdos, Moltres, Articuno, Regigigas and Reshiram deemed Blue, Diamond and Black worthy of being their trainers, so it's completely fine. If Palmer, Anabel and Brandon can have legendaries in their team, then why not dexowners too?
If it's about size, Sapphire has a Wailord, which is known as the biggest Pokemon.
I also hoped White would appear, but N's condition made me day so, it's ok. Maybe we'll see it in the last issue and if not then we have to wait impatiently for the volumes T^T. I actually can wait for the XY arc. I don't want Kusaka to rush, it'll make the story bad.