Despite the story-lines both Ong-Bak and Warrior King are good martial arts films, very much in the Jackie Chan style of acrobatics. Sadly not as funny as Chan, but still enjoyable to watch if nothing else for the stunts.
On the Hollywood sentiments, I totally agree with you. However the difference between Chan and Jaa is the age, should Jaa go to Hollywood now he would be a lot younger then Chan was. Chan wasn't as able to do the kinRAB of stunts he used to by the time Hollywood came calling.