If the plan is to remove all reward mechanism from the steem token so that it's similar to Etherium as a base token people have to purchase to build communities with their own POB functionality

There is no 'plan' to do that as far as I know but it is something that various people have suggested and discussed as a possible destination once all of the pieces are in place.

My own personal view (which means little in and of itself) is that this is something we should seriously consider if EIP doesn't either work reasonably well or at least show significant promise that a few additional tweaks could make it work well.