Agreed, and if they moved Tyler then they'd really have to draft a LG, there's no Pro Bowl guard on the team other than Tyler.
Which means you'd have two new position players on the line, 40% of your o-line.
Whether you want to or not, you'll have to draft or trade for a LT this year.
But it's sad, as Michael Irvin said when Emmitt wasn't retained and left for Arizona: "Shouldn't have happened".
For a player who gave as much, and played as well, as Smith he should be retained, whatever the cost. Hell, the Cowboys have no great playoff success during Smith's storied career, Jerry at least show you care for your loyal players, it's all you have....