yes it is defintly hard to come up with the proper nerfs and buffs for champions to buff or nerf them the exact right amount... especially when u may not play that champsion.
whats NOT hard to do is to see which champs are broken.. and whats NOT hard to do is talk to the mains of said champ to dicuss what buffs or nerf should be given and still have them fun and viable.
the issue i for the most part have had with riots balance team (although i will say 8.4 is looking FANTASTIC and is the best patch with the most correct balancing i have seen in well over a year)
so if we ignore the great job riots balance team seems to be doing this one patch, and we look at previous patches the last 2-4 years.
the isnt is BOTH they are addressing what needs to be addressed, and when they DO address it they do shit that crazy overbuffs or over nerfs it.
they also didn't listen warning that say "if you do "X" the likely result will be "Y" here is the data and this is why it will happen
the best example was when i told riot that removing strength of the ages will nerf nidalee winrate by 8%
hence the famous ( at least for a nidalee main like me) winrate from from 48% to 38% in ONE PATCH (the other 2% was the gutting of
)
what data did i show riot... i whoed them the winrate of the average nidalee who took strength of the ages was 48% i showed them the average winrate for nid whjo took thunderlords was 40%. form that data... it really donest take a freaking geniius to put two and two togther than if you make ALL nidalee take "thunderlords" the winrate is going to drop by 8%.
and yet TWO MONTHS before strength of the ages was removed. i told riot about this. and i brought it up on the forums constantly.
except back then everyone hated nidalee, so no one cared..
at least now riot seems to be fixing things that need to be fixed.