More interesting? I don't know about that. Much more beautiful and detailed thanks to the HD graphics? Absolutely.
I'd be really sad if the Piklopedia was dropped for Pikmin 3. I can't decide what would be worse to lose though: Piklopedia (I've always loved reading about creatures in any video game) or Olimar's journal (in both games, especially Pikmin 2, the journals did a great deal to develop Olimar's character).
well if the Piklopedia does return I hope its information is shown on the table and that each captain including Olimar have notes on the treasures you find my brother,friends and I found all of the research notes of the characters so intresting and funny especially Olimar's in Pikmin 2 his are the best.
Hm... should they expand the function of the piklopedia?
i.e. rather than a screen showing one creature (or species) at a time (not counting the spectralids that appear for killing a prerequisite amount of said creature) , several creatures in their natural habitat and you point at one to open its piklopedia entry. This could also show off the ecosystem that is hinted at in game.