I might up the opal count to 3 come the rule change, but in general, I think I am never unhappy with drawing LED, it just threatens so much on its own. Plus sometimes "discard your hand" is the nuts. As for auto four of on opal, I would ask, what are you cutting for the extra copies. The original problem where you sometimes don't have metalcraft and opal is mostly dead still exists and isn't helped at all by the legend rule change. If you have a suggestion for a 4 opal list I am happy to discuss it, but i don't think off the rip it is just better.

BTW, I won a little 8-man tournament this weekend with my (very close to Tk's) version of this deck. If everyone playing show and tell could just switch over to the "better" version with cunning wish and omniscience life would be so much better. Show and Tell actually becomes an easy MU when there is no Emrakul involved, and it sounds like the new legend rule (as well as the BoM results) might push people in this direction. This might end up being the most relevant post legend-rules change effect for us.

Earlier people were discussing running some number of MisD main, and I think the big thing to remember (assuming you are cutting FoW) is that in an established meta this might be the right call, but legacy just doesn't usually work that way. If the top 8 decks at scg opens were the only decks you saw at tournaments then sure it could be correct, but there is so much randomness in the format that is at least semi-viable it is hard to cut the oh sh*t button that is force of will.

I say this as someone who just picked up my 3rd jap misdirection and is continuously frustrated about force of will having no asian language printing in my otherwise all Japanese painter list. (Transmute and the dual lands are also exceptions to the all japanese all the time deck).