So in light of the new smite and jungler items showing up in lanes it is of my opinion that this can create a healthier metagame than previous seasons. Even a healthier metagame than previous laner usage of jungler items.

Pros:

      The items have less concrete power spikes;
      Only a small pool of laners can use the item effectively;
      Not ever usage of smite will fit in with every team-comp on every carry;
      Sacrificing a more static Summoner with long analyzed pros;

Cons:

     Using them without experience can leave your team weaker in game; (Personal experience)
     The build's are very inflexible to maximize benefit of smite;
     The items themselves once mastered will be quite strong, but with tuning can be improved in terms of        scaling;

Overall the meta may become healthier because, as the inevitable wheel turns in terms of the meta, by adding more builds will allow for a new avenue for skill and strength. Where AP Ezreal can exist with a specific item, and matching build. As well as certain champs that build one damage item, and full tank. In essence a larger depth to the overall game health in terms of the longevity of League.