User blog comment:Willbachbakal/(Champion Rework) Rumble, the Mechanized Menace/@comment-1920550-20161003023000/@comment-1920550-20161006192713

OK. Let me put the issues here in a more straight forward way.

First off your version of Rumble has a major issue, which is a lower value in levels/EXP. This Rumble has almost 0 base values, which means he doesn't even have a baseline when it comes to level based powerspikes when you say level an ability to rank 5. Because he has all of his base values smacked into the passive and ult, he only gains actual values from experience very late into the game and if you fall behind, that curve only becomes worse. A somewhat comparison case is Caitlyn who has superb earlygame, followed by a massive mid-to-lategame drop, followed then by an absurb 6-item endgame spike. Even she has more base values than this Rumble. Since farming for item spikes is in itself an already long process, EXP spikes shouldn't take so long aswell.

Rabid Llama's champion concepts on Bard and Aurelion Sol are actually fairly minimalistic, but they still retain some degree of standart type damage spells or "cookie cutter" spells (their combo potential on the other hand is insane). For example your version of Rumble's shield has no base shield and only scales off max health...so the question becomes, how much would he deviated from an AP build to get atleast equal value from his original shield, and how much would he then lose as a damage threat in teamfights as a result especially since said shield, again, has no base value? Also as you mentioned if he falls behind, he'll have no way to farm for CS since his flame range is lower and his E deals no damage.

A final issue here is damage readability. Since again all of his power is sandwiched into a small part of his kit, the damage actually becomes more difficult to understand from the enemy perspective, especially when you look at the paper kit vs the in-game version. Case and point, Sona. Her base values and scalings on her passive and Q aren't all that great. But she'll still tear half your health or more depending on how well she fared early game with a Q-passive proc and if built AP will actually outscale some of the standart burst mages.