A velcro-only cuff is perfectly fine for most resort riders who stick to groomed runs and moderate conditions. It lets you dial in the tightness around your gloves, keeping wind and snow out during normal riding. If you're not hiking for powder or taking frequent spills in deep snow, you likely won't miss the inner gaiter.
The tradeoff shows up when you crash in deep snow or hike backcountry lines. Without an inner gaiter, snow can sneak up inside your sleeve during a fall, and your sleeve can ride up when you reach or bend. The thumbhole on an inner gaiter prevents both issues.
Go with velcro-only if you primarily ride lifts, prefer a simpler jacket, and want to save some cash. It's a solid, reliable system for everyday resort use. Just make sure to test the closure with your actual gloves—some velcro cuffs fit better over certain glove styles than others.