I could live with this but I'd rather see a speed and effectiveness drain after the 4-5 combo. Lets face it there are only a few great fighters that can sustain 6-7-8-9 strike combos without losing speed and power.
I had a fight last night that went 3 rounds. My opponent threw 378 strikes and only landed 76. I was knocked out and my stamina ended up being lower than his.