It is never wrong to take an OL you like at the spot you are in; unless it is the later rounds and you have already drafted 2 or 3 in earlier rounds. Even then, a high risk/high reward guy might be worth it; or if the returning roster is very short of players you want to keep.

You need five OL just to play, usually at least 7 to get through the season. Generally, the starters play every snap on offense, unless injured or being challenged for the position.

Someone is always worthy of being replaced due to injury, age or performance.

About 15% of your 53 man roster is committed to OL; 22+% of your starters.

I always welcome another OL pick.