It is worth going, there is no doubt in that. My favorite part of Makran Coastal Highway is from Kund Malir up to Buzi Pass. (You'll see breathtaking views of sea, rock formation, princess of hope etc)
But, considering the prevailing heat wave, I believe it is not the ideal time to visit Kund Malir, it will be too hot. The road leading to Kund Malir from winder point is plain & barren, therefore intensity of heat is much higher.
If you can bear the heat than you are good to go, just make sure that you travel in that area in day time only and take with you all necessary stuff as advised by @sirajturk in above post.
Have a look at my travelogue about Kund Malir and Ormara