If you really compare the PQ between true HD channels of TS and Dish TV on a large screen - 46 inch or above, you will notice the difference. Dish TV's HD PQ is much sharper compared to TS. Earlier with fewer HD channels, TS HD PQ was far superior. When they employed compression technology, some change is inevitable. However, PQ is still pretty good on TS.
If TS have indeed resolved their differences with Zee, you know what would be great - if they add Zee Studio HD and Zee Cinema HD along with Ten HD.