the problem with one for all

i've been playing one for all all weekend and i always find one reoccurring problem with it, you cant really pick just any champion you want. now i don't mean your champ didn't get the majority of picks from other summoners, but when you do pick your champ it really has to be someone really easy to pick up, like fiddle sticks and Annie or even ezreal. Of course theres nothing wrong with this, i love going a full lux team, but when you go as some of the harder champions (or even slightly newer ones) like azir, lee sin and syndra, well things start to get confusing (and frustrating). now obviously no every one will know that champion's abilities (unless you got some diamond and master in there, then we chillin) by heart and when you are forced in to playing as first time azir, you're probably not going to be making some nice plays. so when you and one other guy on your team are going balls to the wall playing elise and you see bot feeding hard, you cant really blame them. so when picking a champion, make sure it's and easy one like zileain (i mean hes not that hard right?, just press r on your self and boom your back baby). i mean you don't have to either and carry hard if you like the extra fame, that works too. just don't be a dick when the time comes and you lost because of top and bot lane pushing right to your nexus. always play the donger,that's what i'm saying.