Granted, Wlad's a great boxer, and only a foolish fighter would just swing away, but how about a few more combinations? Maybe a few body shots? Maybe after landing with the 1-2, throw another 1-2 right away, and KO the bum? Instead, we either see Wlad immediately back off (to admire his work?) or clinch.
Wlad TRIED his hardest to put Wach away...throwing lethal combinations. Wach simply had a iron chin...refused to go down.