Malduk, jmizzle7 said that the game is not based on buffing creatures and i gave him some examples. If these buffs are strong or not depends on how you make the deck.
And jmizzle7, there are many good buffs, a quinted oty isn´t a good buff? i bet you play (or played) a quinted oty on your rainbow deck to kill FG.
Pegasus and wyrn are costly, and to activate the skill you have to pay. To play ability pegasus you have to be at least duo deck. If you want to buff too. Well, they have their synergy that if you build a good deck they can be very powerfull (I repeat, IF you build a good deck), but playing alone they don´t do much thing.
When people talk about nerfing or buffing a card, i ask to them if they thought if the card is good/bad on a mon, duo, trio and rainbows decks. Sometimes is only playing rainboes decks, and think certains cards are worthless, but they have their use in mono or duo decks....