Every mmo I've played has had some kind of 'mids'; I'm sure GW2 will as well eventually. I doubt it does yet given how new it is; give it some time.
GW2 is definitely more graphics intensive than CoH but its been running fine on my system that's a few years old (Vista/i7 950 intel quad core/9 GB ram/GeForce GTX 465).
I played CoH for around 5 yrs and didn't actually get into Mids builder until late in my CoH career. ( I wasn't a big numbers guy). I soon realized that the char. Builder made the whole game and for me was a game in itself. I might give GW2 a shot, but want to know if other Mmo's have builders or plan to have them. Was Mids one of kind? CoH was my first mmo so I don't know if this is a dumb question. Also, Another question. Is gw2 a huge pc spec upgrade from CoH ?