Some champions are outclassed and have kit overlaps with other champions
I would like to mention here some champion overlap (Outclass) I am going strictly by the high elo in low elo some stuff might be reversed
IT DOESNT MATTER WHO OUTCLASSES WHO AT GIVEN POINT IN TIME ALTOUGH I AM SURE I LL MAKE NO MISTAKES. Even if you disagree on some overlap this thread is more off here to inspire Riot to actually give me A FKING REASON TO PICK X OVER Y OK?
I ll start with easy ones
As far as midlane goes
outclasses:
outclasses:

If you master syndra the other champions are just weak versions of Syndra.
Luckly
is not an ancient gem due to
. Brand niche is being an AOE mage... Oh what a niche not like every mage is an AOE mage, atleast the dot saves him due to gold synergy
You could argue that in Banner meta Veigar was outclassing syndra. But historicly for vast majority of a time syndra is outclassing the other 3 Now the Velkoz true damage niche doesnt exist. There is no point in picking velkoz for the true damage when you can pick others and simply do more magic damage, not to mention that syndra has better CC, Orbwalking potentional, pick of potentional.. ETC
In a World where Voidstaff and to an extent, sorcs and oblivion orb become less relevant Velkoz would have a niche but that never happend and I cant imagine riot gutting last non autistic ap items.
outclasses : 
Ziggs Q hitrate against good players is non existant. Infact ziggs is extremly unreliable against good players. The whole waveclear niche he used to have doesnt exist since I cant pin point the excact moment but around late 2014, around that time I had to drop my main because he became irelevant
AP
currently outclass 
Taliyah specificly is simply the best Spam damage mage (this also probably shouldnt exist... she basicly has no cooldown on Culling) She can control just like cass on top of bursting her roam is so much better. She also outclasses Brand, and Velkoz
Ap kaisa we all saw the strats where they funnel gold in her.. yeah those strats ll never happen for cass
currently outclases 
Statisticly Fizz is top tier atm (lolalytics)
Ther is a big competition between this 3
You know its bad when a player who had #1 lb world status multiple times and has around 3k games on le blanc since season 1know that he has to swap to zoe if he wants to climb (I personaly dont care that much if I climb atm but if I ever ll, it would be a time i play Zoe and actually max correctly )
I hate how both Ahri and Le blanc were handled to a point I am on the edge of quiting the game The overhyped and overvalued le blanc gut revert perhaps didnt influence much unskilled le blanc players which even 999.999% of LCS players were, but I dont feel like going in detail there is a reason I Invented an insult "Gunblade le blancs" bad players who rushed gunblade basicly and couldnt abuse on hits
As far as Ahri goes, By wanting to give her more burst she just becomes more similar to others, not to mention that The ALWAYS USE E FIRST OR YOU LL DO LESS DAMAGE ON AVERAGE ALREADY FAILED AS AN IDEA... you shoulda change her W
Zoe does more true damage than ahri Zoe has as good if not better CC Zoe has as good if not better mobility, Zoe has way better burst and damage like way better
Ahri mobility is more free but it nowhere near compensates it
Ahri might have better waveclear but her mana problems make that irelevant
If you master zoe ahri is horrendous in comparison
- this thing.. I understand he is a dragon but a Sustained damage insane waveclear Roaming burst mage is perhaps uhm slightly to good
he is pretty much just OP atm. Well he has been consistently OP quite often since his realease. I can list you champions he doesnt outclass it would be a very short list
outclass majority if not all juggernauts
AKA juggernauts with an actual range, idk what else to say
outclass 
This is very obvious
Thresh Q has higher range, yes the pull is smaller but that is widely irelevant since its more then enough + stun duration is quite long Thresh also has good other abilities
As far as pyke well blitz is all about hooking and then having decent damage... pyke is like that to except he has more stuff. In a past atleast blitz would outdamage thresh early but now there is another hook champion who matches blitz damage
Every single enchanter currently outclasses
seriously she needs none troll base stats, Riot is afraid of her performance in low elo if buffed
Reggardless the assist changes hurt her and ll continue to hurt her if Riot has further ideas she deserves normal base stats
Tanks are horrendous but ussualy
Sejuani / gragas outclasses every other tank Zac outclasses every other tank if farming becomes to easy / none relevant or something
Amumu is always sad, Nautilus is always sad, Rammus is the most irelevant champion in a game for seasons. Even at his insane 60% winrate he was so irelevant to a point i though the sites were fking bugged
Rammus should always have naturaly high winrate after all he is picked against full ad teams almost exclusively
apart from recent taliyah jungle there ll never be a reason to pick another ap jungler as long as she is at this state
Elise probably isnt outclassed by her I mean she shouldnt be but even despite that she is go to AP jungler in 95% cases