When importing a PSD that contains groups with layer effects or layer masks applied, After Effects simply disregards them without warning. Ideally AE should support these common photoshop features or at the very least, present a prompt detailing which layers have unsupported features. Currently when I receive a new PSD from a designer, my standard process is to bring it in to AE and try to spot all the layers that are broken then play a detective game to figure out which unsupported feature in photoshop is causing the issue. It could be far more streamlined.