Question: I can only assume that replica ones are not and can easily become magnatized?
No idea, honestly. I've got a couple of A6497 movements that are keeping really accurate time, so they can't be magnetized at the moment. Does that mean they never will? No clue...
Question: Why are the spokes on some balance wheels flared and others straight? My only assumption is that it as heavy of an alloy as berrylium is, it is to reduce weight?
Flared balance wheel spokes are indicative of a 6497-2 movement (which the A6497 is a copy of, but ALL "Swiss" rep movements are 6497-1), so my assumption is that it has to do with the higher beat-rate of the 6497-2.
Question: We see the Incabloc shock found here, but there are also novodiac shocks on ETA 6497-1 movements. Do Novodiac shocks appear on genuine movements that you know of?
Nope, not that I'm aware of. Perhaps some of the Pre-V or very early Vendome era movements did, but I've never seen any pics showing gen PAM movements with the Novodiac system.