No, this isn't another thread about how overpowered they are. A change I'd like to see is that, instead of casting it to lose a turret somewhere else, have him unable to lay another turret until he "packs up" at least one turret. The number of turrets he has stored could be displayed by a buff indicator, similar to Corki's rockets, and he would pack up a turret by using the spell on a deployed turret. Packing up a turret would remove all levels and advancements from it (resetting it, if you will), but "out-of-date" turrets will be upgraded to the most recent model. If this is too much of a nerf, it could be made so that packing up an upgraded turret recharges Upgrade. Finally, defeated turrets will re-appear in his backback after a short time (maybe 30 seconds or so, but one at a time).
Resulting changes:
- Heimerdinger will now need longer to move his turrets and will be encouraged to keep a few in reserve for instant placement.
- Dead turrets stay dead longer.
- Turrets would have to be spread out a tiny bit more.
- The game would feel more realistic, since you could see how many turrets he ha in his backpack and they don't magically teleport.

they are strong against some champs -- very strong -- and worthless against others.. but they do magic damage. spell block + ???? = profit. they can debuff your spell block, too. that's really really bad if you go to negative spell block. amumu, fiddlesticks, soraka, karthas, evelyn.. they all can also debuff magic resist. might be forgetting some champs, too. 30 to -20 magic resist is ~77% damage taken to 117% damage taken... that's a huge increase. 100 spell block to 50, however, is 50% damage taken to 67% damage taken. Way more managable. 150 to 100, 40% to 50%. Nobody builds for spell block, everybody builds for AP, Heimendinger punishes that in a bit harsher way than some other champs. This is also why "zomg soraka is raep now".