I also like the new rewards page, but I wish they kept the stats too. I don't care for the leader board and never paid attention to that anyway. I'd also would have liked it if we could have gotten a reward to appear in game, even if it was just a decoration like you now get when you finish collections (Yay for version 1.00.04).

Some ideas:
Abundant Security - Food Bin Changes Design
Ancient Elder - New flower by the graveyard
Alchemy R Us - New cauldron for the alchemy room (maybe make it a gold color?)
Child Prodigy - Not sure on this one
Jack of All Trades - The ones who reach this should at least have it as a title and not just Esteemed Elder
Fungus Among Us - A mushroom is carved out of stone for decoration
Legendary Leader - Add a new design in the amphitheater where the robe hangs
Prolific Procreation - Not sure on this one
Tech Wonders - Some new object for the science room
The Doctor Is In - Some new object or design for the Medical Room.