Pacheco had a war which he didn’t need to have. He showed grit and won but didn’t need to win so difficult.
When dealing with pressure from a shorter opponent here’s some tips.
Break their posture with jabs , stiff arm probes
Don’t wait on a counter-> Use the jab
Duck smother clinch if you overwhelmed
If clinching underhooks turn but don’t stop the punching use overhooks.
Destroy any high guards
Compact punches down the middle work don’t need to throw wide all the time.
If they try use head movement to get close hook and change angles
Keep your hands up when you throwing uppercuts.