I think they already have the makings of a really good offense, just need to shore up the Oline a bit, but even that group is starting to come together. I don't know that they need much more than one or two pieces on offense to be great once Mac has a full year under his belt.
They do indeed need more than one or two pieces... And that's just on the OL...
Defense on the other hand is a different story, there's a lot of holes at inside linebacker, DMac at safety will probably need to be replaced next year or the year after, the Dline needs another good playmaker, and the secondary is not playing to the level it should be.
No argument there.