Fire Emblem is a difficult series, I don't know if you guys have heard

[Words Of Wisdom]

Pinab said:

But in Part 4, they're not that much of a waste.

If it's not Royal, it is a waste. 

They take too much EXP to level.
They don't stay transformed nearly long enough.
The enemy AI will target an untransformed Laguz before most any other unit/condition in the game.