Is there anyway that we can 1 day have something like this introduced in ESO?
Basically what these items are, are items that allow you to reduce the number of items needed for set bonuses by 1. Meaning for example you could wear 4 pieces for a 5pcs. bonus set, and obtain the 5pcs. bonus. Many multiplayer and single-player games have these items in them, to allow even deeper build construction. While enabling players to mix and match sets for variety.
For example, Diablo 3 has this as an accessory item (ring), called “The Royal Ring of Grandeur”. While Nioh has this as the “Yasakani Magatama". And I can name many other games that utilize items similar to these. But ESO has none. Why? Just think for a moment. Being able to wear 4pcs. BSW, but obtaining the 5pcs. bonus. Or being able to wear 2pcs. Willpower, and obtain the 3pcs. bonus. The combinations could be endless, and would allow a lot more variety in builds that we see today.