My though on unbalance or gameplay after 10k games
most important though : this game is boring, there are no long term goal. There are no infinite upgrades, no unlimited lvl, no runes with random bonus ala d3 which make the game boring once you understand the general gameplay of this game. a special mode with these features should solve lot of problems for the hardcore gamer.
General though : -there are too much %hp damage, it makes tank non viable.
-Regeneration items are too weak lategame compared to baron buff (3%/5sec which is WAY too high). You should make warmog 2%, and baron 2% insteed of 1% and 3%.
-Item with stasis (GA, zhonya) are often too strong (zhonya +khathus, swain, figgle because you do damage while taking 0 damage. or GA+glass canon because it make burst useless). also stasis reduce your CD.
-Riot clearly underestimate the power of waveclear.
-I dont like at all the new trend : the more you are low hp the more you will regenerate, and the less you will take damage. -> %current hp damage combined with %hp missing health regen or heal make the game a festcancer of trololo i will heal/barrier at low hp and buy GA because it make me low life etc You don't feel rewarded or "optimized" to be full hp.
-too much rework, people are often angry after a rework because they have the feeling you ruined their main champ.