Oh, I see... you make a judgement on MLS purely on what you see on tv. Well.... I saw some crap soccer in the Championship this weekend on tv, but I'd not call it a crap league.
There are MLS players who routinely perform at a high level for their national team when called upon and players who via the MLS have become quality elsewhere because of their start in MLS. You can look for the warts if you like and you will find them... just as likely to find the same issues with some individuals in EPL and even more in the Championship. There's some routine horrid defending and goalkeeping even in the EPL, but it does not mean the entire league is dire.
Being "well up for that move" and actually executing on it successfully are two entirely different issues. I hope it goes well for them...