I'd like to see all the errata added into 2nd Edition rule pages available for free download from the MMP website, so we can print them off ourselves - rather than the hassle of "sticky" errata. My colour printer can do almost as good a job as MMP's publisher.
The whole point of having a binder is to accommodate changes like that - not make you buy a new binder every 5 years or so.
If there is too much errata to make such a scheme feasible, then there is something dearly wrong. I mean true errata - broken rules or missing sentences, not interpretations or re-interpretations. It's been 25 years, decide on the damn rules once and for all and then leave it alone.
If there really must be a change to the rulebook, do it to accommodate Programmed Instruction. Allow people to either buy the whole rulebook, or just Chapters A, B, H to begin with, with a suitable "bridge" module between the ASLSK and full ASL with scenarios having just infantry. Then an armour and ordnance module where you get Chapters C and D and the appropriate pages of chapter H. Then a separate module for Chapter E. But this time keep them in print. Or, as I said, also sell the whole shebang for people who want the entire rulebook and don't need the PI modules.