It's good for trying new characters/builds and getting your first win of the day bonus. Past that it only really gives you bad habits. You can only learn proper positioning, teamfighting, etc. by playing against people. --- Winner of the Third Hacked User Contest. World's #1 Phoenix Wright fan.
Well this slightly disheartening as a new player. Most advice I'd seen is go for bots, don't touch actual PvP. I'm not even level 10 so I can suppose it doesn't mean much. Although I will agree it does make you fear ezreal skillshots as I've seen the ai be ridiculously accurate and predictive of human movement.
I was curious if intermediate equated to some level of regular human play to a degree. --- Don't get mad, get Glad. Then suffocate your problem away.