Kyler Creasy was actually the full time starter to start the season. It wasn't until he got hurt and Freeman proved himself capable that the 2 qb system became a thing. Personally I prefer Freeman, I feel like he's shown abilities that you need in a championship qb aside from his arm, but obviously Kyler knows the offense better. I trust in Creasy to make the best decision for the team.
Oakland does base out of the Wing-T, but they'll show alot of different formations over the course of the season, so what Oakland does can vary from team to team. Creasy has had teams at Oakland that could sling it, but in a given year, most of Oakland's talent is OL,DL,DB and TB. If Creasy wanted to, he could have a 2,000 yard passer every season. I suspect next season you could see more of Morris at WR if Haynesworth can stay healthy and proves to be a guy Creasy can trust. That's assuming if Freeman stays at Oakland