I concure with Thrudh.
The gain-curve should best be linear. When it is you can go by fluff and personal preference when deciding how and if you want to customise your character, instead of being pushed into one direction or the other by game mechanics.
Meaningful choices and relevant character customisation options are sone of the biggest factors that sets DDO apart from the pletora of other MMOs out there. If the current backloaded numbers would go live you would have created another trap-option.