If anything, his bowling was heavily overrated. He was definitely not a replacement level player in that role alone.Yeah, Davison is massively underrated, one of the most explosive openers of the 2000s era. The whole Canadian team was dependent on him. He also bowled a handy off-spin and maintained a better economy rate than the frontline bowlers.
However, his explosive approach to opening the batting was rather ahead of its time, and that is borne out in the stats