Well, I don't agree with this project, because there are many points to keep an eye on:
• Comfort for passengers during that endless tacking, 250 km/h are too much
• Pilots, but humans in general, weren't born to do a downhill approach with an oblique landing...
• Wings and Engines are in dangerous
• Different ILS, systems, exc. ...
And the most important:
• My bad English is dangerous for your eyes!
Remember, this is only my idea :)