I find the minimum bowling speed increases the low end pace you get from seamers. Medium pacers consistently bowling in the 60s or Fast Medium averaging about 80mph is more frustrating to me than anything. I had Fast Medium bowling mid 80s to a high of 96 and Medium pacers 66-80. These were 1992 World Cup teams that I've skilled, I've made sure accuracy is high and bowling speed or turn is the second highest skill. All bowlers are set to Balanced. Given the speeds I'd be tempted to reduce the bowling speed skills and increase the swing and seam.
I don't know if it's something being done in the beta, or even if it's a useful suggestion someone would like to take on board. But I think taking field maps of where people are hitting and comparing with the fields that are used (they must be able to identify those that are used in the 41-50 over period) could at least give an idea of how a field needs to be adjusted, new fields need to be added or changes made into the lines and lengths that bowlers use.