The lav to pax ratio on the XLR is actually lower than on the rest of the narrow body fleet(except the 321T). The issue is lav placement. All the other 321's with ~190 seats have 1 up front, one mid cabin and 2 in the rear. That's about 48 pax per lav. This XLR with 155 seats has 1 up front and 3 in the rear which is a ratio of about 35 pax per lav. But the bottleneck created in the aisle having no mid cabin lav is a huge mistake.