Yeah, Beckham, Thierry Henry, Robbie Kean, Tim Cahill, others came here after their prime.... but a certain Nigel Reo Coker, Clint Dempsey, Jermaine Defoe, obefemi Martins, Michael Bradley (after an excellent stint in Italy), all came while still competing in Europe (probably others too, I really don't follow it closely, spending my time with the BPL instead.) The most interesting thing to me about this is that I think I see a definite drop is speed of thought from BPL to MLS but other than Beckham, Robbie Keane, and recently in a couple games, Dempsey. They are not miles above the rest. Most games, these big stars, look like just another player on the field.
Personally, I think the biggest threat to the MLS is the BPL. With NBC's new coverage, I can sit in my living room and watch every single match and every MOTD. Since the closest MLS team is currently 640 miles. (atlanta starts in 2017 thats 120 miles) The BPL is actually easier to follow. On the other hand, I will pay for tickets in Dallas and Houston this summer and drive there for AVFC, no matter who our owner, manager, CEO, or players.