The meta could be a lot more diverse...
Here is what the current meta looks like in a nutshell: Top: Tanks, Bruisers/Juggernauts (AP or AD), Fighters (including bruiser-built assassins), Marksmen Jungle: Tanks, Bruisers (AD only), Fighters, Marksmen, Assassins (Diana/Nidalee) Mid: Assassins (AD or AP), Mages (Lux only), Marksmen Bot: Marksmen Support [Bot-Lane]: Tanks, Mages, Utility
Not bad, but I think it could be better. Here is what I'd like to see:
Top: Tanks, Bruisers/Juggernauts (AP or AD), Fighters (including bruiser-built assassins), Marksmen
Jungle: Tanks, Bruisers (AP or AD), Fighters (rarely), Marksmen, Assassins, Utility [Support Junglers building tanky or AP bruiser]
Mid: Assassins (AD or AP), Mages (Any), Fighters, Marksmen, Hybrid/AP-On-Hit, Utility (Mage)
Bot: Marksmen, Hybrid/AP-On-Hit, Mages, Assassins (AD or AP), Mages
Support [Can choose any lane or roam]: Tanks, Mages, Utility, Bouncers (Bruiser Supports), Marksmen (as poke supports)
Next season, I'd like to be able to see things like:
Top:
(AP Bruiser) VS
(Tank)
Jungle:
(Tanky/Utility
) VS
(built AP Juggernaut
)
Mid:
(Marksman) VS
(Mage)
Support [Mid]:
(Poke support) VS [Roaming]
(Bouncer support)
Bot:
(AP-On-Hit/Mage) VS
(AP Assassin)
Think it could happen?

is probably something so good I wouldn't consider it a troll pick or off-meta at a certain level. He's stronger than just throwing a Zed in bot lane as far as the earlier pre-6 game is concerned.