Thanks for the in depth answer shane!
"I would first say what do you mean specifically by "swap" but it appears you are only talking about the Server and Architecture."
Yes we're moving onto their platform and are basically just changing the design of the webstore template so its similar to the previous one. Losing about 80% of the categories amongst other things because of the set up too
The reason they're moving to amazon webstore is they already store all of their stock in the amazon warehouse (they're originally amazon sellers) so they would rather just have the store completely automated which in my opinion is short sighted and I think theres a good chance it won't progress further than where it is right now because of the move.