Because the "old" Holy Sword spell becomes a waste of effort to cast because once you get to epic levels, the weapons it creates become obsolete.
Second, the "new" Holy Sword spell is far more similar to its PnP version than the old one, while they have their differences, they are similar in purpose, to buff your weapons. I'd rather the spell as a whole gets changed instead of letting it sit there gathering dust.
About Avenging Cleave, I am against lowering its power and tier because other classes cant get their most powerful enhancement cleaves until level 12ish with 5 levels of their class. Also, Avenging Cleave will inflect a stack of Vulnerability (1% extra damage from all sources of damage) to ALL enemies hit by the cleave. Am also guessing that it will stack up to 20 and since its applied after you hit a group of enemies with Avenging Cleave, your party's damage will benefit.
my own concern is, how much AP will these abilities cost and will we have enough AP left from KOTC will we be able to spend in other trees.