With Polk/Baker - they have multiple OC-level guys in the room coaching them. McDaniels OC, Todd Downing WRs coach who was previously an OC, Thomas Brown pass game coordinator who was previously an OC. A lot of experienced coaching all giving them feedback.
Plus, McDaniels' system routinely squeezed production out of lesser talents, and those two guys have talent. If they can take the coaching and grasp the system then they should at minimum be productive, and potentially be solid starters. If they can't, they'll probably get traded.