These items should be in cash shop exclusive as to not compete with in game content. Can you imagine if sleipnier was awareded for odin XM and also purchasable via cash shop? Many people will just buy it. Making it so that there is no incentive.

Same with vanity gear. As it stands most require hard to get mats, thus costing upwards to 3mil gil or less. If the same vanity gear will only cost me less than $5 I'll take it and save my gil for other things.