Problems importing AI files whether PDF, EPS or otherwise

Every time I import AI files, I have challenges. Today I am trying to open or import a PDF that was made in either photoshop or AI. There are hundreds of "Mesh Fills" that show up and you can see the lines between each one. Not to mention the crazy amount of RAM that is exhausted simply trying to resize the file or work with it in any way. Any suggestions? 

More specifically is there a way to simplify the file during input?

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