Limitation on activity feed, contact diversification and field layout

I'm not able to customize the layout of the fields in the "Add Deal" window. I would like three columns but Sell is configured to do just two columns.
If my contact moves to a new company and I'm still able to cultivate new deals in their new company, I can not update the contact with the new company and maintain their old company in their record.
The activity feed is unable to show ALL small updates done within a deal expect the updates that you see in the filter.