Smoking? How do you model two of those at once?
Valorous? I can't stand this enchantment even when it's only applied once (damage multipliers are nasty all around). But a +1 ValorousValorousValorousValorousValorousValorousValorousValorousValorous Lance sounds rather ridiculous, with x11 damage on a mounted charge (before class abilities).
There'll be others, I'm sure.
Result? No one really puts more than 1 or 2 on a weapon anyways. We rarely use vicious (it's magic damage, so DR shouldn't apply). Merciful was only wanted by one of my characters (DM rarely rewards good characters or punish evil characters, so most head toward evil).

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.