I have no problem with increasing the timelimit for these spells. The argument raised that it makes this game easier is silly and rediculous; you have many other spells you can be using for that time frame, if anything it increases the difficulty as you have more choices to make when you don't have to automatically recast those buffs.

However, increasing the timelimit means You Must Remove the Effect of these spells when the Source Player Removes them from His/Her Action Bar.

Otherwise, it will be abused to the fullest. I also believe this is why there is such a short timer; to prevent people from casting it on themselves and removing them from their bars.