this shouldn't even be a question.
SketchUp is arguably the most widely used 3D software. Handcuffing formZ users to using unreliable exporting techniques to put models in SketchUp is a bad business decision for all parties involved.
Example: I was asked by a client to have the SKP version of a file that has already been rendered out. So now I'm spending X amount of time trying to figure out how to efficiently get my formZ model into SKP. The only format I can work with for geometry and textures is 3DS (I don't have FBX or OBJ plugins, and neither does the client). Of course not all the textures are translating properly and trying to edit these textures in SKP is a nightmare with all the 3DS facets. So now I'm back in formZ trying to "fix" the textures so they work properly from 3DS to SKP which equals wasted time and wasted money.