Just to be clear anything already Standard legal that is in the set is still Standard legal; so for example if you buy this you can use the four Professor Sycamore, lone VS Seeker etc. in either format. You just can't use something like Darkrai-EX in Standard because copies of it in this product are identical to its original release to avoid counting as... is referring to it as a reprint or a re-release less confusing? Well whichever one the rules refer to when a "new" card is the same as an older card except for things like set stamp and collector number and thus all previous printings become legal.
A bit odd but with Expanded being a heavier focus this year (and that fact that I really do not want many of these older cards back in Standard), a good thing.
If this increases the supply enough to significantly blunt demand, then yes. That is hardly a bad thing; the only benefit those that make this game receive from the secondary market is that it sometimes fuels purchases in the primary market, namely card shops that sell singles buying a few boxes for their initial inventory, and even that is probably from a distributor and not TPCi (or whichever official company is relevant). TCGs tend to be a lousy store of value for this reason; cards don't have much inherent worth because they are just colorful bits of cardboard (sometimes with shiny foil) and their value is dependent upon how available the manufacturer makes them versus the demand by collectors and players.
Plus any competent businesses should have known about this product ahead of time (they probably had their vendors trying to get them to preorder it!) so they have had plenty of time to adjust unless they were sitting on a stupidly huge amount of all of these cards and/or horribly overpaid for what they already had.
