I'm okay with letting Juice and Patterson battle it out for the starting Center position. I think whoever wins will be good there. LG is a massive question mark.
Can Kenyon Green play at a starting level?
Kendrick Green was decent before he got hurt, but can he be a quality full-time starter?
If Juice starts at Center, can Patterson be effective at LG?
Can Broeker possibly emerge as the starter?
All unknowns. Given the information about Howard's injury, RT will need to be addressed with at least a good quality reserve. I wouldn't be opposed to resigning Fant and drafting Patrick Paul in the 3rd round.
These are the concerns that keep me up at night. I go to bed, put the offensive linemen tape on, and fall asleep watching. They finally signed a free agent -6'6" 350, 19 BP's, 7.44 .... I'll bet he is a great guy, really .... but we run a zone and the linemen have got to be athletes !