I agree - I think Lewis will not only work well at RT, but moving him there should make it easier/cheaper to find a replacement. Fundamentally, guards are cheaper than tackles.
Unfortunately, Jensen looked anything but amazing last year. Huge disappointment. I honestly was surprised Lewis took what I thought was his job to lose. After seeing him last year, I'm extremely reluctant to see us planning to have him be our starting LG and I'd think the Ravens would be too.
Lost a center, lost an RT and no one has come in to replace. The draft is weak at that position, so it is unlikely that we'd be getting a stud in the 1st round and unlikely that we'll find a late round gem if the overall class is weak. Sure, we might add a camp cut late, but right now this position group is very, very scary.