Hextech crafting not rewarding new content

A few days ago I unboxed a few shards in hextech crafting hoping to get some cool stuff. It so happened that I got 3 ward skin shards, all of which I already owned. I figured, "cool, now all I have to do is re-roll those 3 shards and I can get a new ward skin that I don't own." Sadly it didn't turn out the way I was expecting. Unlike the hundreds of champion skins, ward skins are much fewer in number and I just so happen to own every single one available. The re-roll of those 3 extremely rare ward skin shards (about 1 in every 15 - 20 boxes) gave me an already owned luminosity ward. I'm really disappointed that I used 3 shards that took me forever to get only to receive content that I already owned and can only be used to disenchant, since re-rolling again would wield another already owned ward skin. Whats more, I could have disenchanted the 3 shards for more essence than what the permanent one alone would wield. I know the argument still stands for getting useless champion shards while owning every champion in the game, and that is understandable, but this was for otherwise paid content and I'm just upset that I lost a lot from it.

On the PBE if you owned every item that is in a certain pool of loot, the server would not let you combine shards to get unowned content. For example, if you owned every skin in the shop (ridiculous yes, impossible no) and then re-rolled skin shards you would only get legacy content, and once those skins run out the re-roller failed and would return your shards. On live I own every ward skin that crafting currently has in its pool of ward skins, the only ones I don't own are season 3 cs, all-star, fist bump, and seasonal rewards apart form last season's victorious ward. I'm fine with not owning those skins because they were limited and special and I understand why they are not available in crafting. The only thing I want to request is, similarly to PBE, if you try to re-roll shards and can't get anything new, the server should stop you. One of the primary goals of hextech crafting was to make players feel good about their purchases and I feel that it has mostly lived up to that promise. I hope this problem is fixed in the future so no one else feels gibed like I did.

Thank you for your time.