There's a lot to like about effects like this,
even if they are symmetrical. Some decks are
better positioned to take advantage of one or
more of the effects than potential opponents -
Maze's End springs to mind with regard to the
extra land, for example. The Orrery is also a
welcome addition to the "group hug" style of
multiplayer decks, as both of its effects are
tempting enough that it will often deflect
attention to other potential targets. Some
opponents might even be tempted to change their
style of play and jump the gun on plays they
might have made later, in the interest of
potentially digging deeper into their deck,
which can open up opportunities for your own
strategy.
Ghirapur Orrery seems cute, a way to reload when
you're depleted and get more resources on board.
The issue, of course, is that it affects
everyone, you and your opponents. They also
probably get first stab at these effects, and
it's all too easy to have the Orrery backfire
(they draw their 4 cards and blow it up before
your next turn).
The only place this makes sense is as a piece in
either a Nekusar or other group hug-style EDH
deck, where you benefit from giving them all the
extra resources. But I don't think this is worth
it outside of that narrow application.
