Give us a reason to use the alcove.
Disclaimer for the downvote monkeys: I use the alcoves. I see their value. This is more about teaching new/bad players to utilize them, instead of ignoring them.
In most games, there's no point to going back there. Put a health relic back there. The old speed boosts from dominion. Hell, put a neutral monster that adds a vision ward to your inventory if you kill it, and grants bonus gold if you have a support item.
That being said, I play characters that can make use of the extra area, but I can see how players with different playstyles will never use the alcove.
in particular) can put it to good use, but many can use the extra fog of war to creep up on the enemy duo as well. You just have to learn where the vision break points are and manipulate your positioning to abuse it.