Just made the trip Early August.
57 is a must avoid due to construction. Took 19+ hours down that way from North of Chicago.
Came back on 65 and it took 17.5 hours. Very little construction on 65 vs 57.
FYI 57-24-75-Disney is 32 miles longer than 65-24-75-Disney.
Approx 30 minutes longer.
Just leave at the right time to avoid rush hour traffic at the key points (RT 80/65 interchange, Indy rush hour, Nashville & especially Atlanta rush hour.
Of course the construction south of Atlanta ~ 60 m.p. to border, is still there (getting better), but does not slow you down too much if you hit it at the right time.
I find leaving Chi. ~ 1:30 pm gets you to Disney ~8-9am local time.
Another option is 7:30 pm Chi --> Disney ~ 3pm local.
I usually leave Disney ~<-- 4am & it

gets me home ~ 10-11pm Chi. time.
Above (driving straight through - only gas stops) misses all normal traffic jams.