It actually sort of feels like Nolan has become less confident as a director as time has gone on, strangely. Like, The Prestige might be his most confident film - complex in plot and concept; structurally bouncing all over the place - and he seems to do all of this quite seamlessly while never losing sight of the characters and themes, which are almost definitely the strongest in any of his films. The performances from Jackman and Bale are fantastic. The film ebbs and flows in exciting, dynamic ways.
By TDKR and Interstellar, there's this absolute clunk to everything that's going on that I can't quite put my finger on. It extends past the obvious exposition and into the editing, the cinematography, the pacing. It all just feels quite rigid, like Nolan doesn't quite have the feel for what tone and pace each scene should be communicating to best reflect the story at the time. He doesn't quite seem to have the confidence to take the elements in a bold direction. It ends up feeling quite sterile.