This would give scrolls more of a market, and better use. Wouldn't unbalance anything since most of the note-worthy spells have requirements for magery and eval int for magnitude and duration (only humans would have some rudimentary bonus to some scrolls from the +20 jack of all trades), along with the fundamental intelligence requirement for certain circles (7th and 8th circles use to require 40 and 50 int respectively, not sure nowadays). It'll give scribes more of a market to sell inscribed goods. this means there could be some utility use of magery scrolls for templates that want to work around the restrictions of relying on heavy, uninsurable, one time use scrolls. the other spell should work this way too, but as their spells almost exclusively require the corresponding skill and syngery, this would be of no use except to very specific templates, if any.