About the Assassin's items rework

I will probably regret pointing this out before the higher level players notice because they are having fun playing with new toys but here I go. I noticed that riot Created/ Reworked bunch of Items for assassins. It feels like assassins were meant to build these items together. The thing is all the Items Share the Unique passive: 20 Lethality. Meaning unless the actives/ passives among more than 1 item are a absolutely necessary, or the the stats are just over all too strong to ignore, you are only gonna build one lethality item then go into bruiser / adc damage items once people get tired of playing with the new items and start to look for efficiency. Back to the season 2 and 3 days of lifesteal assassins healing a third of their hp each auto and many of them with auto attack resets and a spell for them to use to defensively or even more offensively because why run when you in a winning position. If you wanted them to build multiples of these items with out snowballing out of control you would put 5 lethality here 10 lethality there to encourage building of multiples of these items. Also ad assassins got 'assassin healthy' items but ap assassins still useing those mage items.