To Conandar, yup and I have done so for a good long while. However...
Dannyboy7702, no more than any of the other custom sections already made. Just 4 parts would be all that's really needed:
Ability bonus, because many feats give a +1 to an ability.
Description, to be put in Race, Background, Class and Feats section of CS IV.
Active features to be put in that section.
And passive features to be put in ability features.
Yes, everything else you have to add elsewhere, but there are many custom races, subclasses etc that need that too already. Any other parts he might would of course be nice eg proficiencies, resistances, saves.
It's not complete, but neither is any other custom section nor could they be. But this allows much better organisation and covers most of the situations with feats while being relatively easy to implement.
And before anyone gets themselves in a huff, it's not like I'm demanding this feature be implemented or asking for UA material to be built in ;'] I'm just proposing a feature request. People have done so before and some have been implemented. I'm putting forward the benefits as I see them and for ForgedAnvil to judge them and weigh them against their difficulty. That's not to say other's can't criticize of course, but constructively.