KMST 1.2.437 - Black Mage

In theory it would be good to need 1 of each hero and why not 1 of each class, people would need of every class(including the more "useless" and almost extincted classes) making them neccesary

Theory doesn't translate well into reality if it's not founded on logic or experimentation.

In GMS, not only is it hard to find characters of different classes for PQs, it's hard to find people to PQ with at all.

Now exacerbate that problem tenfold by requiring 1 of each of a multitude of classes, of which there are 30+ total, some of which are time limited, and those almost extinct classes, rather than becoming useful, will in practice only deter players from enjoying that new content.

If a PQ doesn't have a solo option, especially if party play requires more than just another person, then in the new age of grinding over PQing, it will ultimately fail for not taking into account the new realities of MapleStory.

Then again, KMS may not have this problem while Nexon America just doesn't seem to care about it.

Suffice it to say, novelty and "coolness" don't exactly decide the worth of new content. It's all a matter of incentive and availability.