If they can bring back the Johto Daycare Center feature in the HGSS games, then at least that would be better. Seeing as they have already re-made the Sinnoh region, I don't think they will be able to put that feature in for a while.
Perhaps if they put your pokémon in pokémon costumes that wouldn't make sense because a Snorlax is too big to be in a Buneary costume. So it is logical to say that some pokémon will either be too big, or too tiny to fit into pokémon costumes and look just like that pokémon; if that's what you guys were talking about.
I do recall someone from Solaceon Town that it's not confirmed that the pokémon make eggs together yet, so I don't know if that could be a reason that was forgotten from Nintendo. It seems pretty amusing that if the eggs are not made by two pokémon, how do the eggs get brought to them? However, legendaries do have special legends which can be something to deal with the eggs...