I think I figured out why Towers feel so weak now despite being stronger than ever.
They stand alone!
In seasons past Towers felt more threatening because they usually had more defenders. It was often an even fight + 1.
Now the long death timers make it so that towers are less defended or not at all and on their own they don't put up much of a resistance. That's mostly due to their targetting priorities I guess.
Heck in this Season if you get one tower and a teamfight, you can win, because you meat no resistance untill defenders respawn. But death timers are so long that you can destroy all the structures before they do.