A new rune system proposal

What about a new rune system where you had "Rune Tokens" that could be placed into rune slots in different categories:

Rune Token: A rune token can be placed into any rune slot. You can only have up to 9 of any specific type of rune token at once. Categories: Special (3), Utility (9), Defense (9), Offense (9)

Example Runes: Armor Rune: Special: dealing physical damage steals 1 armor from the target, stacking up to 3 times, lasting 3 seconds ; Utility: Reduces armor reduction effects by 2% ; Defense: +2 Armor ; Offense: 2 Armor Penetration Resist Rune: Special: dealing magic damage steals 1 MR, etc etc same as Armor Rune Damage Rune: Special: Lifesteal ; Utility: Thorns vs AA ; Defense: Taking physical damage reduces attackers damage by 1 for 3 sec ; Offense: +1 damage Power Rune: Special: Spell vamp ; Utility: Thorns vs Abilities ; blah blah etc etc. Speed Rune: Movement speed ; cooldown reduction ; decrease attack speed of attackers ; increase your attack speed

TLDR: Runes would be universal and fit in any slot. The type of rune combined with what slot it occupied would determine the effect. The maximum number of any given type of runes would still be 9.