If I got the chance to rework Snow Globe and only Snow Globe, in addition to the shooting through bit, here's how I'd do it. If no SG present, tapping spawns a small globe that begins expanding, which works similar to Gara's 4, either stopping once it reaches a max range, or you tap the button again to stop it. If inside a SG, tapping simply reinforces its HP as currently. If outside a SG, holding warps the oldest SG to your location, while if inside a SG, holding shatters the current SG with all the effects from currently blasting it with Frost's 1.