You should unlock all runes and summoner spells at level 1, period.
Getting to level 9 was a struggle, for that's when you unlock the most important summoner spell of all, being flash. Playing against someone who has flash, whereas you have something like ghost, is just fucking miserable and unfun. They have way more kill pressure, escape potential, and all around more flexibility in the game, where it takes you 2 seconds for your ghost to even ramp up to it's fastest speed, not even factoring in that the champions you get for free offer no escape tools in their kits, being Ashe, Garen, and Brand. There is no learning curve behind forcing new players to wait until level 9 to realize that Flash in infinitely better than everything else. Half the low level games that I play in are souly based around who has more flashes, like last game where we lost because we had 1 flash on our team to their 5.
Unlocking smite at level 9 is also a huge pain in the ass, because more than 80% of the games under level 12 (Factoring in that not everyone is going to be the same level) have a duo top and a jungler on the enemy team. So not only is this fun for the 1 player who has to 1v2, lose tower, and and can't farm or learn at all, but it ruins the comp for the other team because they can't secure objectives like Dragon or Baron.
The more bigger issue of all though, is the fact that you have to be level 8 to even pick what rune tree you want to use, level 9 to choose which rune of that tree you want use, level 11 to change the secondary runes of said tree, level 15 to change your secondary tree and level 17 to finally hit the inspiration tree. Why? Why can't you just unlock them all from the get go? What is the purpose of this? I seriously cannot even fathom it, where is the learning curve? What is the thought process behind this? Let me put this into perspective: Bruisers are forced to take Grasp, meaning Gnar, Nasus, Darius, etc. Mages are forced to take comet, ADC's are forced to take Press the Attack, and if I'm not mistaken, any tank support is forced to take Grasp as well, which is complete bullshit.