For me i think they shuld take the work of BI and continue maybe inprove it to the end.For sure are somme secrets in develop or in story that captivate uss that much. Maybe this new work from Bethesda will be without the all old fun.
I played Fallout Tactics i can say at begin never tried live fight only turn based. But when i use the Humvie whaz great to run and shot .Nice experience so it will be nice to be Turn/live at our choise.