I once had a friend who i played 2ed ADnD with, who was always talking about the most powerful 1st level spells. He proved the worth of Enlarge/Reduce (enlarge/shrink then I think) time and time again. He would use reduce to shrink a locked door, causing enough space at the edges of the door so that it could be easily opened, and once, under a very lax DM he even shrunk a wall of a temple causing it to fall on some ogres. I know these examples are a little powerful and should probably not be allowed by most DMs, but if the low power of this 1st level spell(s) bothers you, then allow your players to use it more creatively. Let them shrink a set of bars in a window, allowing them to escape capture or a trap, or whatever you decide to allow! Encourage creativity and your players will surely surprise and amaze you!