1) On Live UOSA, if you have zero stamina, and you continue trying to move, you eventually regenerate 1 stamina and are able to move. As I remember it, you were unable to regenerate stamnia at all if you were attempting to move at zero, so you were forced to wait until you had a minimum of 1 stamnia or else you'd stand there stuck.
2) Here, if you try to move certain items (e.g., a robe you're wearing), it interrupts your spell casting. I do not believe this change was added until UOR.
3) Murderers were not allowed in Order/Chaos guilds.
4) Recalling or gating would take mana if "The location is blocked." Gating twice to a blocked rune was a buzzkill.
5) I am pretty sure that released dragons would attack blues and greys as well as murderers. I recall people releasing dragons and drakes at the Deceit entrance and witnessing the aftermath.
6) I do not believe that house ad ons became deeds when a house decayed during T2A. I think this is a later or RunUO addition.
7) I think debuffs lasted at least slightly longer than they do here with low magery. A weaken with 50 magery seems to last about 10 seconds.

9) I believe that emtpy bottles were 3gp a pop, not 5gp, during t2a and sold for 1gp.
10) I believe taking a murder count made you perma-grey during most of t2a, and that whether a character was perma grey or not could be checked by attempting to steal from them as a character not in the thieves guild.
11) I think that "All release" may have worked as a command, and I've heard that "All guard" did. They don't seem to work here.
So, there's my little list. Let me know what your folks' thoughts are, and maybe we can reach a consensus on some of them.