He hid in Shaolin to learn those skills...but his dream was to restore the Yen kingdom.
How would learning those skills help?!
In terms of martial arts, he was already amongst the best. Besides, his dream was not to conquer the wulin, but to restore the Yen dynasty. Where was the army he had to raise?!
If he wanted to frame and stir up the wulin, won't honing his Star Shifting Technique even more be more efficient?
You could argue that he left it to Murong Fu, but Murong Fu was basically failing.
Am I missing something or was Murong Bo actually not very smart when it came to trying to pursue his dream?