I must add that some modern FMA techniques wouldn't work with a real blade. You have to use a stick (i.e. blunt weapon) or get yourself all cut up. With that in mind, I really don't see the value in moving from sticks to simulated blades.
That is definately true if you are working with a blunt impact tool mentality. However, many FMA's work with an edge/blade first mentality and those that train this way need to work with wooden blades, simulated blades, etc. If you want to work with just sticks that is fine but remember all of those things you learn certainly do not translate to the blade.