Totally agree. Our original room was an HI but we bid and got into the HE for a good price. My wife prefers the room in the Haven itself, as it it is more "convenient" to just exit the room and you are already there.
Out of the 11 or so Haven categories, only 4 don't have that tub/shower combo. They are: HG Forward facing, HB/C aft balcony, H5/6 2 bedroom, and the H2 Owners. Everything else has that tub combo. The majority of the HI, HH, and HJ rooms were once Concierge Suites in the Asian market, which I believe prefers tubs.