I don't mind retracing at all. But it has to be done properly. As much as I hated Enkanomiya, retracing was the least of its problems. Tsurumi was also alright even though you had to play it 3 times. But mapless dungeons with single pathways stretching across half the zone is a massive no-no in general, all the more so if you have to backtrack across it while dealing with utterly misleading teleports and corridors to get a single chest or a dendroculus. I mean, even with a map it would be bad, without it it's plain atrocious. I would definitely prefer if they had harder, but self-contained areas. I mean hell, they literally put pyramids in the zone, could you get any more classic than having every pyramid be its own thematic mini-zone instead of these stupid, kilometres-long, mirror image corridors?