All of that works well in most scenarios but lets take the case of an icon from the stencil pack, the active box that surrounds it and which the laser points to is far bigger than the actual icon. This means that when you are trying to bottom align with text for example, you just have to have a best guess as the lasers and alignment don't use the bottom of the actual icon. This type of issue also occurs when you have grouped objects and you are tyring to align them in some way with some other object.
Ideally I would be able to just pull down a guideline from the ruler to use for one moment, align what I need and then remove it. UXpin has this function and it comes in handy from time to time.