Just kidding. I know what you mean.
So I went to the range with a beginner player (to minimize distance loss from any snap deviation)
122% Driver at regular loft gets about 288 carry/303 total on current fairway settings
122% Fully lofted driver gets 291/303
100 % Driver goes 271/284
Fully lofted 276/289
Then I tested a 5 iron.
122% only goes 189/194 barely an increase from the default distance
303 with the driver isn't shabby by any means, but as we all know the mishits are pretty ugly/unplayable.
To simulate having a real bomber player, you could increase the amount of benefit from the overswing area and let people decide for themselves. Make it so irons could go a full club further (10-15 yards) and maybe get 300 carry with the driver on a pure strike.
I do like the default distances now though. The potential to go long would be pretty fun to have in reserve.
Now THAT'S a good idea! I like the idea of having the over-swing have more of an impact on the distance. If you pair that with an attribute system it could be pretty cool. If your player has a higher distance attribute then his/her over-swing might generate significantly more distance than a normal player but the penalty for mishits would also be greater. His normal/100% swing would also yield more distance as well.