Update:
I got a call from Technical team and they asked me what the issue was, i told them the entire story about the PQ issues (some dull/color tint) which appears to make the PQ appear low as in come issue with color/hue/contrast. I said the Picture is sharp but something is missing.
He was polite and said that all STB are tested first before launching officially. I told him that yes i agree and all the STB ae of very good quality and have no issues at all but if a issue is detected at a later stage, they must solve it. He agreed saying that Transfer STB, HD DVR and even some STB in past had some issues which were solved via s/w updates later.
He said that the STB has no PQ issues like i said and as each hardware is different from others there can be slight changes in how the Picture is decoded (color/hue/contrast) on different types of TVs. He asked me to try changing the TV Picture settings to see if it becomes better, as they have tested it in different TVs and found no much different in PQ.
However he said that the technical team has received feedback on this and they will try to solve this issue soon as the manufacturer also has to give a suitable update which can be applied. I also asked him about other issues like Alerts not coming on time, etc, he said they are working on it too.
This is a positive reply, and i hope that they will fix it soon. As Humax SD STB doesnt have this issue.