Everyone always misses the point of reworks.
It's not about making them stronger or weaker. It's about changing unhealthy play styles or generic kits that do everything. On a grander scale, for class reworks, it's about changing a large pool of champions that suffer from abusive interactions with itemization, weak synergies in need of updating, infrequent niches and various other reasons to name a few examples.
When these reworks happen, the initial goal isn't to gut a champion, to make them stronger or anything like that. It's to make it so Riot can make broad changes without fear of certain champions abusing said changes. People talk about all the class reworks being a failure and maybe some of them have yielded some less than desirable results for certain champions. In those cases, that's probably a good thing because it just shows those champions required isolated attention. In the larger scheme though, those changes produced better itemization, healthier gameplay and stronger diversity.
People will likely go nuts and point to "failures" such as Malz, Morde, etc. To which I'll point to you Darius, Vlad (who I initially hated but once I played and got familiar with playing against I love), Swain, etc. More importantly, black cleaver became a staple item across the board in the juggernaut patch. AP itemization has greatly diversified since the mage update as opposed to stack as much AP/CDR as you can, assassins got their own items. ADCs overall got more diverse and less generic right clickers. In the big picture, these updates made the game better. Yes, some cases sucked and some will need to be looked at but riot isn't perfect - neither are you. But for those that are "weak" from these reworks, guess what riot can finally do now? Buff them without fear of breaking them.
Tanks might be good, they might be bad - I don't know. It's going to take a few patches before we know for sure. But by the end of the season, I can promise you that overall, once Riot figured it out, tanks will definitely be healthier and better overall. And that's the ultimate goal of class updates and in my mind, they've been extremely successful.

make the itemization of all tanks more diverse.

