Well yes, you cant lay all blame to the launch title, as we see some experiences should have prepared designers for low ram situations. For example Castlevania 4, had beautiful environments with little tile count to speak of. Though there is no doubt inexperience with a console can hamper development. Compare Castlevania 1, to 3(j), graphically.
Anyway, about the merman room in my engine, if I were not able to increase the performance of the engine (due to project schedule, inexperience, etc), that room would have to be down sized graphically. Thus the 'new to the console' idea. That was the reason for that example.
I hope we can produce something better than Circle of the Moon though
