Honestly, I'm thinking that the best way to remedy this is to have a fighter with longer reach. I suspect if said boxers rating for movement is in the 18-20 range.. he can spam the slip easier.
It's almost comical.
I'll say that overall though.. when you fight a sim person online, it's really enjoyable. But the biggest change for me is that Fighting offline on GOAT is not an AI perfect block counter festival anymore. Champion difficulty was a little to easy for me before the patch, so I always played on GOAT. Now GOAT is almost perfect. The fights have a much better slower pace. AI Manny will actually look like he is taking his time, and not just come out swingin, and perfect blockin, and it's still a challenge.