For all its faults, the Tiger's reputation alone should take it out of the list. It became so much of a bogeyman that every German tank appearing became a Tiger to the troops facing it. The King Tiger was a step too far though.
I can't honestly think of something that shouldn't have been introduced and was. Even the interwar tanks were sound designs for their time and the doctrines they were meant to be used within. Having said that, many designs were spoiled by financial or production constraints.
On that basis I'll offer all the 2pdr armed British tanks though, on the basis that there was no HE shell available to them, a glaring limitation to what was, for its time and intended use, acceptable armament. Added to which the cruisers were mostly built without the aero-engines they had been intended to have. As their protection was intended to be speed and not armour, this was a bit of a faux-pas to say the least.
I can't honestly think of something that shouldn't have been introduced and was. Even the interwar tanks were sound designs for their time and the doctrines they were meant to be used within. Having said that, many designs were spoiled by financial or production constraints.
On that basis I'll offer all the 2pdr armed British tanks though, on the basis that there was no HE shell available to them, a glaring limitation to what was, for its time and intended use, acceptable armament. Added to which the cruisers were mostly built without the aero-engines they had been intended to have. As their protection was intended to be speed and not armour, this was a bit of a faux-pas to say the least.