We were on I-4 (between I-75 and WDW) on the morning of 1/31 (Monday - 9:30 am) and the afternoon of 2/3 (Thursday - 12:00 pm). We never had to deal with any backups or lane closures.
I know it's worse on I-4 between I-75 and the Tampa airport, and we have been stuck in traffic there more than once, but the majority of I-4 was fine.