From what our insiders who've seen the specs have said, then Len is way off.
Going by their excitement the tiers would be:
1. Class by itself, Super E+ (Super Headliner): RotR
2. Super Es (Headliners): SWSR, MMRR, ToT
3. Regular Es (Major Attractions): F!, Indy Stunt Show, RnRC, Star Tours
4. Ds (Minor Attractions): the projections shows with their now greatly reduced fireworks, TSM, MV3D, Frozen Singalong, Ariel show, BatB show, Slinky
5. Cs (Diversions): Launch Bay, M&Gs, Jedi Academy, Saucers, SW Stage Show, SW First Order March, WD Presents
Of course, such divisions can get rather subjective whether something belongs one step up or down. Problem is that Len only has four levels above 'Diversions' and DHS is going to have a whole bunch of E-Ticket rides that invite further classification.