Dynamic View - problems

we are using DV's on the new project hoping it would streamline the process from model to drawing sheet

the problems we have encountered are making me think that drawing extractions were perhaps easier and quicker

before I explain the problems, I will explain our workflow

We are working on ProjectWise for modelling and in the creation of DV's

a) reference all 3d models into one composite model - this is where we have made the DV's

    note the DV created is only the model, not drawing sheet as we need to use client supplied files for all output

b) reference DV model to drawing sheet model space, note the model space in the client supplied file is 3d not 2d

   note we need to add sections or multiple plans in some cases which is also why we don't create the sheet at the create DV stage

c) reference the model space into the sheet space adjust and add notes etc.

Problem 1 - when we print the drawing it is taking in some cases an hour or more. the print preview shows blank unless rasterise is ticked. when it rasterises it creates 42 tiles which is why it is taking so long

Problem 2 - when references are amended, the dv that has been referenced into a drawing sheet looses its clip this has meant we have had to re-create the DV and bring it back into the drawing model space all over again

Note, our models are placed on a geographically correct grid (provided by our client)

I tried ripping the files from ProjectWise and printing to PDF, this made the process slightly quicker but still rasterising

Questions

1. Is the rasterising happening because the referenced DV files are 3d?

2. Is our workflow flawed in any way?

3. Are the problems related to placing models on a geographically correct grid?

4. would it help if the drawing sheet file model space was 2d and not 3d?