I'm one of those sickos who likes playing with mismatched cards, and a feature I wish had been in the collection update is the option to mix and match styles, rather than having a style be locked to a specific printing of a card. Right now, there are two printings of each shock land on Arena, and numerous excellent styles, most of which are locked to the Guilds of Ravnica block printing and as such are mutually exclusive. I can't use the old border from the recent holiday sale in the same deck as the clue version or the planet version. I know this is a low priority fix that will only appease a small number of folks, and I can understand if it's more work than it would be worth, but I'd appreciate this feature.