I propose Heimerdinger gets a fun change
Now, when you aren't getting kills as Heim, or just stuck as a support, or even laning against someone like a decent Ashe, Yi, or Yasuo, I find him to be kinda boring and on that last point, absolute, butt-clenching hell to play. That 20 second turret recharge thing is dumb, and the fact you can only have 3 turrets is kinda lame. Now, I'm not proposing that he gets 84 turrets AND 2 second turret recharge AND more range on his turrets, I just think he should be able to upgrade his abilities like Viktor can, but different. He's the one who's building the darn turrets, bombs and rockets, he should be able to make them better!
New Heimerdinger™ He can have at most 1 upgrade for each of his 3 abilities. These won't benefit Heimerdinger, only his abilities. He has 3-6 slots for self-upgrading, depending on how many ability items he'll get. (if that wasnt clear, he can have 1 q upgrade, 1 w upgrade and 1 e upgrade, but no r upgrade bc r is different)
Q upgrade suggestions: Mass production - takes off seconds from the 20 sec time, at level 18 he'll get 1 turret every 10 seconds or so Better lenses - takes off of laser charge time, taking 60 seconds off at level 18, making his turrets go back to pre-7.11 recharge rate Metal plating - makes his turrets not so squishy, also scales with level. 2.5 armor/level? Faster reload - ups the turrets attack speed by .05 per level Farther range - farther range, probably just a flat upgrade Bigger pockets - can store and deploy 4 turrets!
W upgrade suggestions: More aerodynamic - fly even faster than they do Remote control - they can fly the same amount of units, but they follow your cursor even after you fire them, so they can curve. Stressing the point, they dont fly any further than they would otherwise, but they follow your cursor for that amount Fly further - fly further
E upgrade suggestions: Bigger bomb - bigger blast radius, doesnt scale with level probably More electrons - longer stun, scales with level but only a little bit since i believe the stun gets longer anyways Missile - instead of a bomb, a missile that gets to the target location faster but is basically the same otherwise
Of course, these would probably need to be heavily balanced and probably take a long time to implement, but it would make Heim gameplay more fun and marginally more difficult since you cant really get used to his regular abilities since they change so easily. Maybe 2.5k for each upgrade?
(this is probably way more op than i realize, but i think its balanced out by like no ad, ap, as buffs for heim himself, so he only gets 3 items to buff himself)