As with all things in simulators, the aspects of the vessel's performance that can be varied are limited and inter-reletaed. Changing one thing will affect many other things. No matter which set of characteristics get improved, somone will find that they don't like some other aspect which has also been changed.
As most of the time in PoR will be spent going forward, the forward-going characteristics seemed more important than going aftwards.
As Sadsid says, if you don't like it, the remedy is simple. Run the installer again and select the original characteristics. Easy!