Understandable. However, I feel that T-10 format could attract a bigger audience primarily due to the length of the games. Many people don't even have time to fully watch T-20 games from start to finish which is where the T-10 format comes into the picture.
It would definitely feel unfair at first, but I am confident that viewers would get used to it pretty quickly.
In the end, the viewers will get whatever they want. Even for the T10 format, the total duration (90-100 minutes) is slightly longer than a standard football match or a game of field hockey. In the future, T10 may become the preferred format and T20 may face the same fate as that of test cricket and ODI. Nowadays viewers want maximum action within a short duration, and T10 is very much suited for that purpose. And who knows? It may make cricket more popular in markets such as USA and Japan, where baseball is dominant.