Setting aside filming technology, the remake of Shogun is not as good as the 1980 make starring Richard Chamberlain. First off, the character development is much stronger in the original make. Second, the actor playing Blackthorne in new make is unattractive with a heavy British accent speaking so fast that sometimes becomes inaudible. Third, the actress playing Mariko is so stiff. Fourth, Japanese actors are expected to have certain foreign accent accent but not the British, Aussie or New Zealander accents.
Overall, watching the older make again, I find it to be superior to the new make, in my humble opinion.