Thanks everyone for the tips.
After reading your comments, I've decided to let Moai unchanged for a while. I think also there will be many people not buying the Poly DLC, thus they can still use the wonder if they wish.
@Zyxpsilon - You wrote about "Package status" and "ruleset deviations".
One of the purposes of these wonders is to let modders to use them in their modpacks, modifying the effects accordingly if needed. Alternatively, every player can choice one or more wonders to play with at his pleasure in a vanilla game.
An "all-wonders" package results in a huge "ruleset deviations" for sure, although it could be funny for someone. Obviously I prefer to let wonders as separate addons.
A "ruleset deviation" is what I absolutely don't want by these wonders. If you (or someone else) think that there is one or more broken wonders, please point the finger on it and I'll change its effect accordingly. I prefer a useless wonder instead of a unbalanced one. In my games usually I build wonders for pleasure more than for strategic reasons.
@Moriboe - There are no chances to find a LHC painting somewhere. Its splash will be a photo, of course. May be just a bit reworked with graphic tools.