well, the seatmap is not very accurate .. as others pointed out 1D is actually in 1E's position with 1D missing ... 2E is not a bulkhead ... but 2D is, with alot of space in front, but also everyone bumping into it ...

Another point: I generally find their 734 more comfortable than their 738. In paricular the legspace in row 1/2 is better.

Finally, the J class lavatory is further upfront, towards the cockpit, so not disturbing you in row 1.