How do you suggest capitalizing on a fort destroyed?
Simply win the lane.
These changes are, ultimately, designed to make the lane a competitive place again instead of something you just rush through to soak. For players who think 5v5s happen too much or want for split-pushing, they now have an avenue to do that if they can outplay in the lanes. Take your catapults and push with them instead of roaming around and expecting them to magically do the thing.
If you don’t, you’re giving the defending team a big window to even the match, which is exactly why these complaints of “we were down all match but we didn’t lose” are coming up – the winning team is throwing their lead.