I honestly don't believe it will make much of a difference summoning-wise but if it makes all the folks that hate wyrmprints happy then it's fine by me.
What I really liked was the fact that you can buy them with eldwater! And also the changes to dupes. Before them getting a dupe felt really disappointing, but now not only you get extra eldwater from them (I'm going to be swimming in that stuff when the update hits from all the dupes I've pulled lol) but you can also use it to buy the best wyrmprint for your favorite characters!
Really happy with the changes and looking forward to the FEH crossover, I might start playing the game a bit more thanks to all this. Hell, I might even spend some money down the line!