Good lord. give me a break. A guy's ability to throw three good passes in a spring game says absolutely nothing about how he would perform against a real live pass rush. As Urban Meyer has said regarding a spring game: "A bunch of winning going on, good effort by players, maybe some guys didn't play so great," Meyer said, "but that's OK. It's spring practice." So yea, it really does not matter unless you are showing no effort.
I don't think Joe Burrow looked bad, but I do know that he didnt take a snap against a first team defense all season. Here are joe burrow's stats against the 2nd team defenses he played: 22/28 78.6% completion, 3 tds (rush and pass), no picks, 8 yards an attempt, 58 rush yards, 169 qb rating.
Here are JT's against the first team defenses of those same teams, 100/147, 68% completion, 21 tds (rush and pass), 2 picks, 8.7 yards per attempt, 217 rush yards, 171 qb rating. All this shows you is that how you perform against the teams that ohio state kills is not an indicator of how you will do in a game against clemson or michigan, or penn state.