Erm lets not.....
why not? I think bringing back the speed control would be a useful feature.... i used to like speeding up some games after a streak, so I could get through the boring "take take mode" it was also useful for some machines which play too slow. I'm not referring to the emulation speed accuracy of the original machine (which is spot on BTW) but that some machines played so slow In the real world...A little nip of speed could transform some games enjoyment....
but I'm sure their must be a reason why it's been removed.......