If there's going to be so much anti-tower/siege mechanics in S5, we need more ways to build turrets

With all the new "bonus damage to turrets", upgrades to Ohmwrecker, and other such mechanics, there's one critical flaw I've found: TOWERS DON'T RESPAWN.

Unless your enemies have an Azir, that Ohmwrecker or Elixir of Ruin will run out of purposes after some time. Towers aren't exactly hard to kill, you know; they're still pretty crappy.

To remedy this, I think there needs to be an item that lets you build a temporary turret, like Azir's Sun Disc, on a tower ruin. Compared to Azir, however, I say this item should only work on turrets on your side of the map (so you can't use it for sieging), and has a very long cooldown. Additionally, to prevent CD exploits, it would only sell for 40% of its value (like a Guardian Angel).

This would give Ohmwrecker and Elixir of Ruin good reasons to exist: To counter said new item. Said item would be great for helping your team defend inhibitors or creating advantageous defensive positions.

Anybody want to lend their opinion?