In some states this could almost make sense but Texas is not one of them.
254 counties and most of them have almost no one living there.
For example - Brewster County is almost 6,200 square miles with only 9,000 residents. The entire state of New Jersey is 8,700 square miles with 9 million residents.
In fact, out of 254 counties....211 of them have less than 100,000 residents. 92 counties have fewer than 10,000 people. Democrats cluster while Republicans hate people and live out in the boonies. There's no reason why you need an "electoral college" especially within a state. Only logic is the idea that candidates need to court all voters, not just big city donors. However that supposes that a city with 8,500 people deserves equal attention to Houston, Dallas, Austin, San Antonio or El Paso.