Holmes: five form alignment
ACKS: spell formula versus spell repertoire plus free casting from repertoire
Neoclassical Geek Revival: Level breakpoint achievement requirement, especially at level 15 and beyond.
Actually, how many people ever really get to level 36 in BECMI/RC or level 20 in AD&D. I know D&D3 was designed to get to level 20 in something like 18 months (which WotC found was normal time to reboot). I would think a similar philosophy was in effect with Type IV’s 30 levels.
Still, assuming bi-weekly play over two years is 52 sessions or going up a level about every 4 sessions for 14th level (13 level increases). Assuming two weeks out of three (about my adult experience) it’s 72 sessions or just under a level every 5. Even a very optimistic three out of four only gets 77 or a level every 5.5 sessions. That’s assuming no character death.
Do we really need anything beyond BX or LL/AD&D with 14 and 20 level limits respectively.