Did Napoleon's military tactics, strategy and ability change throughout his reign?

Napoleon's greatest weakness; and perhaps a major reason
for his ultimate defeat; is that he did not change tactics or strategy. His ability did
not change, as he did not consider himself in need of adjustment. After the Battle of
the Nile, when he inspired his men with a stirring speech, he abandoned them to return
to France after their defeat by Lord Nelson. Similarly, when his Russian campaign
failed, he again abandoned his troops. Napoleon had a remarkable ability to inspire
loyalty among his men, even after his exile at Elba. He was a master strategist who
personally dictated the placement of every gun and every regiment. His failure to adjust
when necessary was a major factor in his downfall.