I think Riis would have liked to keep the Schlecks on his team, from a perspective of "they were his boys" it was his project from the start to develop them and make GT winners out of them. I think he would have liked to get them up onto that highest step.
But business is business and they decided to leave and do their own thing when things looked uncertain on Saxo, and you can't blame them for that, that's their choice.
Getting the most dominant rider in the field today as replacement, I doubt Riis has much to be upset about.
As for team Lux, I think they'll have a hard first year, like we saw Sky this year, and Cervelo with Sastre and so on. Obviously the Schlecks should be a bit more consistent in their performances than Wiggins/Sastra, but starting a new venture (business/team) of this magnitude is always tough in the first year, even if most of the crew will be veterans of cycling.