TiVo-firmware (which drives TiVo & V6) & Horizon-firmware (which drives TV360) have very different approaches. TiVo is third-party firmware licensed to VM and is very recording-centric. Horizon-firmware is in-house to VM's parent company.
VM's marketing frequently encourages conversions to TV360, and it shouldn't be a surprise that, of the many functional differences between the two platforms, only those which benefit TV360 are highlighted.
Unfortunately the wishlist function you describe, is something unique to TiVo-firmware. I would be amazed if VM accept an "I wasn't told about xyz function" argument as a reason to instigate the multitude of account-level changes needed to revert you to what they see as a legacy platform.