smite should be level one in my opinion, there is no reason you cant learn to jungle on nunu or ww without masteries
There's no reason you should need to buy nunu/Warwick.
Literally, when I started out I didn't want to play either of those champions. I had a couple champions capable of jungling (jax, kayle, eventually Evelynn) as a lower level (pre 20) but since I was waiting until 20 to buy any runes I really wanted to avoid the jungle because you need the early game help on most junglers. It was incredibly annoying being forced in to jungle in 90% of the games where someone managed to call my role before me (e.g. I'd call adc immediately after someone else and then top/mid/support were all called before I could type anything new) or when I was last pick in Draft (started Draft at 15, although here I at least had enough masteries to survive).
I think making smite level 10 is a great idea. Now you can easily say you're not 10 yet, no smite no jungle, and your team can't hate on you for going duo top. The jungle was really hard in season 4 at low levels, and now it's even harder. Definitely approve of this change. Approve even more on the level reduction for flash, as that's a hugely key spell.