I know that having spells like Beast of Burden which is more effective and lasts longer than any feather spell a player can craft is supposed to be one of the things that makes buying spells worthwhile, but I'd really like to have the opportunity to create similar spells on my own. Likewise it'd be nice to have more than one summon or attribute/skill fortify in a given spell.
Stop complaining. I could have done this more painfully. - Dryad from Sacred 2.