I'd love to see an expansion of WMS Features or an expansion of the ShipStation Integration to include their new WMS Warehousing Features:
Track Inventory expiration dates, versions/lots
Tracking on-hand, allocated, and available inventory (vs just the available qty through Pressero)
Mobile Picking & Packing
Barcode Picking
Forecasting Inventory Demand
Locations tied to Inventory
Warehousing Activity Tracker for easier billing (receiving log, storage tracker, etc)