Credit to Joe Silva: these two were eventually matched. They possessed different talents (Hettes better as a grappler, Cacares more confident on the feet), but both had sufficient defensive ability to keep the fight moving. Which is precisely what happened. From Hettes' continuous leglock attempts to Cacares opening himself with missed strikes, the back and forth was hard to inventory. That's partly an indication both have work to do to hold position more tightly, but that their skill sets were roughly tantamount was enough to be enjoyable.
Hettes landed a nice haraig goshi to start the second and the back. Hettes also missed multiple submission attempts from the psotion before the two stood again. However, Hettes was able to eventually take over. The story of the fight? Hettes' positional control in the clinch, enabled by being offensive and aggressive, made the difference. Yes, Hettes lost position often and suffered through several failed submission attempts, but Cacares spent a huge portion of the fight defending attempts or trying to bring the position battle back to zero. That speed chess game eventually caught up with him and Hettes won the scramble.