We just drove through on 75 mid October to Disney, the construction wasn't that bad. There was a few miles where it was 2 lanes each direction and there were barriers constructed b/c it appeared they were moving lanes. I wouldn't consider a different route b/c of it. Go to wsbtv.com and click on their traffic tab, it'll give you up to date info on accidents, construction etc and links to the ganavigator website.
good luck.