Little things about Intro Bots

I know it sounds dumb, talking about intro bots on a (recently new) level 30 account, but I've always been curious about what was different, so I gave it a try on a new account, pretending I was a brand new player.

Alright. Thing the first. My choice of champions currently are: Ashe, Garen, Jinx, Lux, Ryze, Varus, Shyvanna, Wukong, Lissandra, and Kha'Zix. A couple of champions seem out of place on that list. Is Kha'Zix really a good choice for new players? To clarify, since not everyone has recently been level 1, you DO NOT get the normal free week rotation champions until you reach level 6, instead you are given 10 'easy to play' champions.

Thing the second: Matchmaking is weird. I was matched with a level 2, a level 11, a level 15 and a level 30 player. My new account was level 1. Surely there's enough under level 20 people around to make whole teams?

Thing the third: How comes starting items in Intro Bots is so different from that for other SR modes? What's a better set of recommended items, the ones for intro bots or what?

Thing the fourth: Enemies don't appear until 3 and a bit minutes in. That's just weird. A better idea would be to have them appear but they passively farm up until 3 minutes in, then they'll slowly start to harass you.

Thing the fifth: How comes Alistar, Ezreal, Nasus and Galio don't appear in Beginner bot matches? Why are those champions deemed suitable for intro matches but not beginner bots, only to be reintroduced for Intermediate bot games?

Anyway, those are my thoughts. Being a really poor player who could do with learning from scratch, I imagined, I dunno, something a bit better for intro bots.