I understand what you're saying, but the issue isn't booking with The Great Khali. He had a decent 'transitional champion' run in 2007 with the WHC, so given his size alone he could be booked in a useful way. The issue is with Khali's physical stature. Khali lumbers awkwardly & moves at a snail's pace. He is simply wretched in the ring & even worse on the mic. There is just too much young talent throughout the developmental & main rosters to waste time trying to push Khali.
titles are props to accentuate or progress a character. do not have to tell you that it is not always the most athletic, or strongest, or toughest that win the title. i am not creative to come up with an angle, but with the right writing, anyone, and i mean anyone, could be a respectable champion.