A few things.
1) Landeskog, Martin Frk, Tomas Jurco, et al. do not have to worry about the lack of a transfer agreement, they just realize that its best to learn what they can at the junior level in their home countries and progress on to the CHL at 15/16 years old. That seems to be the recent trend anyways. In countries like Slovakia and the Czech Republic, this seems to be a no brainer. The talent level in their home leagues just isn't strong enough to progress top talents properly. In Sweden and Finland, we have seen many players develop in their home countries. Is Landeskog the first of many to go the CHL route? He has a very developed North American style game, perhaps he knew he was suited for that style of play. In Switzerland, Denmark, Norway, you've seen most players either transfer to Finland/Sweden or go to the CHL at 16/17 in recent years. Neiderreiter, Jensen, Bartschi, etc.
2) The problem is that in the past, the CHL was considered if the player wasn't quite AHL ready but wanted to come over to America after being drafted (for whatever reason, cases like Radulov and Grachev). For those players, I could see why they would be setup for failure, because many of these types of players are not strong enough mentally and emotionally to handle a transition of this magnitude without complete confidence in their game. For every radulov you hit on, you could easily miss the boat on the next guy.
3) If you aren't a top Russian talent (or truely a top overall talent) then you should stay at home where you're comfortable and where you can worry about your game alone because your game needs work. The MHL/KHL can truely prepare you for the NHL if that's what you're looking for.
4) Which leads us to top flight Russians. The Russians have the best proving ground outside of the CHL/AHL/NHL route in the world. For the elite talents, the MHL/KHL route will properly prepare a player, provided they should stick it out in the KHL until they are "ready" for North America. Ready can mean many things, but to me, it means prepared (read: talented enough) to land a starting gig in the NHL. Which depends on the age, but typically means you need to be scoring .7Pts/GP roughly at least at the KHL level for an offensive forward. And if they are not emotionally mature, perhaps even better just to be safe. As mentioned earlier, the lack of a transfer agreement has actually come back to bite the KHL, as players are choosing to leave the country at the junior level rather than sign an introductory contract in the KHL. No one wants to be the next Kabanov. So, yes, for many of these guys, going the CHL route was a lesser of two evils, rather than an ideal scenario. But what I think you're going to find here is that the 16-year old North American trained forwards will have NHL staying power that many non-CHL trained russian forwards seem to lack. Many of the best Russians at the KHL level struggle to succeed in the AHL/NHL, despite having been trained entirely in Russia, or mastering the Russian system. So I'll be curious to see how Yakupov, Namestnikov, et al. turn out.
Parting shot:
My personal take for an elite Russian talent is that you either need to go the Namestnikov, Yakupov, Khochlachev route, and go CHL early, or you need to ride out the KHL route until you're NHL "ready." If you are a super elite talent like an Ovechkin or Malkin, you might be best served staying in the KHL, simply because the talent level is so much greater than the CHL. But if you have concerns about ice time at the KHL level, I would probably suggest the CHL route. Better to get tons of ice time and learn some things about the NA game in the CHL than to become buried in obscurity in the KHL (perhaps the MHL begins to make this point moot).