We went to Jaisalmer in Jan 1st week. Took Delhi-Jaipur-Jodhpur - Pokhran route (longer than Bikaner one but Tikri border is closed so avoided it). Dealhi-Jaipur is OK but diverted while returning. So we took Jaipur-Dausa-Alwar-Bhiwadi SH 25 ...no issues on that route.
Delhi-Jaipur : Good road, standard truck traffic
Jaipur-Bar-Jodhpur : NH 162 : Quite good
Jodhpur-- Pokhran- Jaisalmer: Quite good.
Jaisalmer-Longewal : Some diversions but overall Above average route
Longewal-Tanot : New NH 70 : AWESOME !
Quick tip: Follow this route - Jaisalmer-Ramgarh-Longewal-Tanot - Longewal- Ramgarh- Jaisalmer . Avoid Ramgarh - Tanot direct road...longer & under construction.