I guess goog were hoping a lot more people to jump to the Go bandwagon just because they announced it. Yet it really didn't happen... I don't think bashing other languages is really going to improve on it.
Both c++ and Java have their strengths and uses. Java is IMHO HORRIBLY ANNOYING TO CODE IN, but that's actually its strength, it just won't let cowboys get away with doing the things they love to do. Sure, it has been lacking in things, but they update it around, the following update will have some very nice syntax for some data structures (it will get more complex).
The C's also have the advantage of being closer to the hardware, sure you don't need that most of the times, but when you do, they become a great tool in your box, really. It has improved a lot over the years (also known as getting more complex).
Interpreted languages cover for their downfalls when you don't need performance or want to do fancy things with paralel programming. Which is good. Python goes around also improving and getting more complex.
And there lies Go. Its main advantage over other langauges is exactly that. As it is basically undeveloped, it is much closer to what its creators originally wanted it to be. The thing is, that once it starts getting used, and users notice that for example it is pretty necessary for a compiled language to have say generics or exception handling... it will forcefully have to end getting modified and improved and thus it WILL become complex. I do not think that advertising it as "simpler" will work out as since it is a langauge that is intended to be used it is basically doomed to become more complex and thus this selling point will necessarily die. They should advertize it for its superior parallel computing and fast compiler speed, but simplicity... is just a bad idea.