lets see BW trainer that have been reprinted in XY so far...
potion, switch, pokeball, super scoop up, revive, full heal, energy switch, energy retrieval, crushing hammer, great ball, pokemon catcher, super rod, exp share, heavy ball, level ball, enhanced hammer, rare candy, ultra ball, Skyla, town map, escape rope, float stone. 22 in total, of which about 13 we see at least one copy of regularly in tier 1/2 decks.
course this doesn't add in professor juniper/sycamore and tierno/cheren which are same effect different card name which would put us effectively at 24. with this reveal we can also add back in devolution spray and N putting us at 26 semi/full reprints of trainers of which about half are used in top tier decks.
while I don't think a N reprint is crazy bad it's kind of lazy they could've easily gone the juniper/sycamore tierno/cheren route. also with shauna/birch/judge we already have a decent amount of shuffle draw supporters I'd rather have all new or ones that have been out of print for a while like bebe's search or felicity's drawing.
Not all of those are BW era cards, I did a quick search and comparison and here is the list:
Potion - Base set
Switch - Base set
Pokeball - Base set
super scoop up - Neo Genesis
revive - base set (different wording)
full heal - base set (current wording epedition base set)
energy switch - Aquapolis
energy retrieval - base set (different wording)
crushing hammer - (black white era)
great ball - (EX FireRed & LeafGreen)
pokemon catcher - (black white era)
super rod - Neo Genesis
exp share - (black white era while exp.all was neo destiny)
heavy ball - (black white era)
level ball - (black white era)
enhanced hammer - (black white era)
rare candy - (EX Sandstorm)
ultra ball - (black white era)
skyla - (black white era)
town map - (black white era)
escape rope - (black white era)
float stone - (black white era)
juniper/sycamore - (base set with professor oak)
I'm honestly sick of seeing black and white supporters without new characters attached to them, N was initially released almost 5 years ago which is 1/4 of pokemon's timeline and has been in play for almost that long. Which is honestly absurd for a minor character from black and white.