We ran into timeout issues upgrading our remote additional polling engines with the latest upgrade. We love the features of the new scalability installer but need to be able to increase the time allowed for the bits to copy over the wire. This issue just gets worse as additional Hot-fixes are applied to the main polling engine.
Multiple attempts at copying the files were necessary in order for us to successfully complete the upgrade. A similar approach to copying over the majority of the files like the old offline APE installer before initiating the upgrade would also work.