You're confusing sweet spot with club attributes. Sweet spots can easily be adjusted by use of the built in club deviations. The club doesn't change, the variables surrounding the shot do.
If you think about how many times players come on here and complain that the clubs don't work as well as they did when they first got them, it's because their history of use with them is being factored in. The better you hit them, the stronger the penalty for mistakes. The game just needs history to work.
p.s., Prob the wrong place for this discussion. This is a great thread for putting. ;-)