malmshodes: A pretty cool idea for magic with weaknesses. Such as wood having the same strength as a coke can. However I must point out that while it can catch alight you must re-equip it to put the fire out, and unique magical flames will harm it just the same. After all it is wood. XD

As for Iron... I feel that neutralizing peoples magic would be a bit OP, given that everyone uses magic. I only allowed the golden bead in another CS because it was a single bead and could only be used once. However, iron is a conductor so instead of that ability would you mind replacing it with a charge ability? Like if it is hit with lightning magic it is able to store it as a charge? 

Other than that it is accepted with its cool unique magic ^^

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True, I intend to exploit the weaknesses of maker magic later on hahah. 

Either way, Soranea is correct on these matters as even though we all have maker magic, no one can make something that is not what their maker magic is. For instance wood magic can never make fire, ice, earth and so on 

On the matter of Spirit Maker Magic. As your creations would be more along the lines of Celestial Spirit. So in my opinion it is much more limited than Arc of Embodiment. Or simply put: A object can not be a spirit. If you tried to make a cross with spirit magic it would have to be alive and would so end up looking like the silver key cross guy. 

However, Magic Maker is Arc of Embodiment, as the objects are formed from the users magic. So either your type of magic is a sub section which can only make objects and not living things unlike Spirit Magic, or you can make everything as you said but they are so brittle they are one time use things. 

Personally I think Spirit Make making living spirits while Magic Make makes objects would be a good contrast between the two, making them a deadly team together. 

BTW, this is what Make make would basically look like:
http://fairytail.wikia.com/wiki/Magic_Sword