@sozobe,
Stalling is bad.
The longer he stalls the longer he can gain strength before coming ashore. Also, the longer he stalls, the closer landfall will come to coinciding with high tide. Strengthening equals higher winds and higher surge. All coupled with high tide and occurring in the middle of the night.
The effect of all of this will still be determined by the exact location of landfall in relation to Galveston Bay. Current tracks are still that he will make landfall slightly to the west of the bay. Worst case for Galveston and possibly for Houston.