Mysalami, I'd heard that a couple of the big issues with the aircraft were:
1. Horizontal splay with the higher tail requiring some airports to position the parallel taxiway further from the runway and holding points back as well.
2. Loading fuel, pax, food and offloading sewage and garbage in the same time frame, and
3. Positioning the aircraft at gates where the extra wingspan intrudes on space on either side.
Are these still issues?
Unrelated to initial posting, but interested nevertheless.