I have traveled on this route last month and will share updates. Superhighway is under construction and there were 2/3 diversions in worst condition which would easily kill your good 45 minutes, so keep this mind when you plan your first stop over after Hyderabad. Then there is another diversion, i think after Mitiari which is not bad but you just face slow traffic, other than this Sindh road are now very good to keep up the good speed.
Secondly, go via lodhran - multan - khanewal and dont bypass multan, that patch is single road and is somewhat bumpy route and most of heavy traffic use this section. going vai multan have much better road condition.
Last year I took Kabirwala - Jhang - Faisalabad route to motorway, but this year I used Chichwatni - Kamalia - Toba - Gojra which i find better than Kabirwala section. have a safe trip!