Fairy Tail Thread (Spoilers)

Ok maybe useless was the wrong word, what I am trying to get at is that after the CSK disappears, she will end up weaker than she was, unless we expect her to blow up a gold key everytime there's problem. Summoning 3 spirits proved to be no improvement (They tried to hold the demons away and were taken down in a couple moves) and I'd have liked better to see a new technique using 3 spirits at once which'd make her stronger than for her to lose the strongest one she has which makes her weaker.

Is it really that much of an issue? Are there really going to be twelve more occasions where she finds it fit to summon the spirit king before the end of fairy tail? Lucy barely fights as it is, i don't see the problem with burning one key if it solves all of the arcs problems in one stroke.