"Bot builder" type of mode, maybe?

I'm completely unaware if an idea like this had been proposed before, but I had a random idea that I wanted to express.

The game mode is somewhat like a 1v1 with bots, but before you assume what it's like let me explain further.

You go into queue by yourself. When you get into Champion Select (Blind or Draft Pick, doesn't matter), you chose your champion, as well as all of the champions on your team (who are all bots). Each Champion has a "Bot level" (say 1-10), and they all start at 1. As you use champions, they gain exp and the higher level they are the harder difficulty the bots are. So, if you have a team of bots leveled 1, 1, 2, and 3, your bots will perform much less than the same team with 4 level 10 bots. The bots would likely get base experience just for being played, and each kill/assist might give them more. They may also get more experience for objectives (structures, Dragon, Baron), which brings up another point:

Pinging Dragon/Baron could draw nearby bot aggro (say, from bot lane and the nearby jungle, just for example), instead of, like in custom bot matches now, the bots just don't go for them (unless there's some way to actually get them to go after them, which would surprise me).

Anyways, maybe as you play Champions yourself the bot would get the experience. So if you played Lee Sin, your Lee Sin bot would get experience because you played them.

I don't know if this is a good idea, or if it has been proposed before, it was just one that I came up with in my free time. This is also my first time actually posting something in the boards I believe, so that's a plus.