I couldn't agree more on Winter Wanderland being a positive direction, and I'm excited to play in the events and earn some unique packs for a few weeks. I'm not sure on the shiny packs being a worse value (though probably negative ROI either way). Each card slot has a 40% chance of a legendary vs. 5% in the regular packs. That's 8x higher so obviously just for the chance of a given legendary, it's a worse value. However, since they come in a minimum shadow shine (usually at least 2x a meteorite on the marketplace),and there's a 25% chance that it's a gold, I actually think the ROI may be better in shiny.
RE: My Thoughts on the Winter Wonderland Buyer's Guide