I have to admit, for some reason the change from Espeon to Lapras really disappoints me, and is the only thing in the game I know of thus far that does.
It just seems... redundant to have two Water-types in. I mean, yeah, Lapras gets boosted by the hail and all, but they didn't need to add the hail. The whole thing just feels like an excuse to throw Espeon out, for some reason.
Plus the reason why Red originally had Espeon in the first place- all of his team were available as one-time (or two in Snorlax's case) events in Yellow. The starters are obvious enough, Lapras is Water just like Blastoise, and Snorlax is fairly popular... then consider that Fire, Electric, and Water are already covered in his team, and that Karen had an Umbreon- Espeon was the only Eeveelution left, of course.
I dunno, I always used Espeon myself, so maybe I'm biased, but I miss the guy.