Or Nolan is pulling a Peter Jackson and becoming self-indulgent, such that his flaws as a filmmaker are becoming more and more apparent and harmful to his films. In broad terms, arguably, TDKR is like Jackson's ROTK where the filmaker's weaknesses were more readily apparent and the film is somewhat marred by them. Following that metaphor, Interstellar could be Nolan's King Kong - big passion project follow-up to blockbuster trilogy that overdoes it and misses the mark.
I am still looking forward to Interstellar, but I have been trying to keep my expectations in check to avoid disappointment - something that I learned from TDKR and MOS.