We drove that way when we were there in December, and at that time there wasn't any construction. Once you get to Ocala (especially coming from Texas), you are almost there!
Hope this helps -- and that they didn't start construction right after we left, lol!
We drove that route a week ago. No major construction that I remember.
The worst construction we encountered on our trip was on I-4 west from Orlando to Tampa. The construction zone was nearly 30 miles long and traffic was very heavy. We love adding a visit to Busch Gardens but the traffic makes getting there a nightmare.