Where is the trade off?

There should always be a trade off between toughness:damage:utility. That is why the mastery system is broken up into 3 categories! so please tell me why there isnt a trade off in the item category? The tank items give too much damage for the champions they are geared towards who naturally have a lot of toughness and utility in their kits! Tank meta is not ok.

But its not just tanks that get items that are disproportionate to their individual strengths, ever try adc sona? no you havent,_ dont knock it till you try it_ (end build includes: ), works better than you would think, you honestly dont notice the lack of damage except maybe in the first few levels, and you have so much utility that it works fairly decently. i wouldnt take it into ranked, but it is still an example of items working disproportionately to what it should be doing. This is significant because im not some retard just complaining about tank meta because i cant deal with it. Dont get me wrong, adc sona was a troll idea i and i do not actually recommend it. I just played it for shits and giggles. But the problem is that it dishes out WAY too much damage for what it should be!

TL;DR Riot needs to restore the balance between Toughtness:Damage:Utility and the way to do this is to make items that only increase a champions latent abilities rather than accenting their latent ability and giving them a ton of other power basically out of nowhere.

P.S. i understand what im asking for is probably a total game rework and the start of a season might not be the time for this, but i hope riot keeps this in the back of their minds for season 7.