Last patch Tiger Ace received some Buffs, but still some problems. The Tiger Ace is the most expensive unit in-game right now, and that doesn't reflect in his performance, even if we compare to a normal Tiger, the only difference between those two units are (and should be) only the performance of his crew members, not the equipment (the tank) by himself. As de description says: "This Tiger Tank and its crew are veterans of countless battles. Through experience, they have become experts at knocking out enemy tanks and living to tell the tale. This Tiger commander emphasizes caution and awareness over speed.". Nowadays, when you call-in an Ace you don't feel like a unit that his CREW is better than a crew of a normal tiger, the shots against others tanks ricochet a lot and the blitz ability don't match his description if we think there will have better options to fill this slot. In short, the tank does not give the player the feeling they should have.
This unit needs to be powerful (not OP) in the eyes of the owner and fearsome in the thoughts of his enemy. Thinking in that, I will propose some changes assuming your crew should play the key role in this unit: