@Riot Tank vs. Hybrid vs. Squishy

We all know the subject, and it's usually a problem all the time. Tanks are too weak, or hybrid tanks do too much damage, or squishies who by a tank item are no longer squishy.

From what I can see, the problem is that champions who devote their entire or most of their build to tanky items aren't benefiting as much as they should, while champions who pick up one or two tank items on the side are getting all the rewards. Tankiness is being abused by non tanky champions.

#**This could be for a few reasons. **

1. Hybrid items are too powerful. It's possible that because items like sterraks and maw are too powerful currently, damage or hybrid champions are able to itemize much more efficiently, thus having spikes or advantages that are better or faster gotten than full tank champions.

2. There are imbalances in tank items. Certain tank items, like dead mans, are much more efficient or powerful than others. This means that tank champions will have some highly efficient items and some not, while damage champions can build efficient damage items and only the efficient tank items. Tank builds are always fairly linear and limited. CDR options are low, MR tank items are far too buffed, and items like randuins were nerfed a bit too much.

3. Scaling is messed up. In the case of juggernauts and some other champions, they have the problem of too high base damage with ok scaling. This way, they are able to retain good damage while still building tanky items. Some of them also have abilities with % healt, % missing health, or true damage, which adds to the problem.

What do you guys think? Are these the reasons that balance has been, well imbalanced, or are their different reasons (regarding this subject, not others :P)? Any Riot employee thoughts?