Do you know the stupidest thing about Masked Hero? Masked Hero considered as a fusion monster, however it can't be summoned without Mask Change, and when you summoned it with Mask Change, it doesn't count as fusion summon.
A quick-play spell, needs only one tribute, and the boss monsters are hidden in Extra Deck. Even Koa'ki Meiru isn't as stupid as MH, because Koa'ki needs both monster and spell (Maximus and Iron Core) on hand, also Iron Core isn't a quick-play
It's not the last sale. Cards first introduced in Selection Boxes will be eventually reprinted in a regular box, so we're going to see a major Hero box again like Valiant Souls in the future, a box that will feature Dian and Solid Soldier, and possibly other Hero cards.