Bethesda intended to put an arena in at least Chorrol and Anvil, but I'm not going to even try and squeeze something that size in there. Cool as it may be.
So there's some idea of what's going on: http://img713.imageshack.us/img713/2548/chorrolreborn.jpg
The south end became the commerce district. The Oak & Crosier plus all the shops are there, flanked by the middle class housing. Should be obvious where the guilds and upper class went. The Grey Mare, graveyard, and lower class is on the north side now. It's not obvious from the overhead, but the castle, upper class area, and chapel are all on raised land. I've tried to level out the slope west of the chapel as much as possible, there may yet be more to smooth out. There's not much room for anything useful in the gaps around the upper class area since the mound rises much more sharply over there.
I'm thinking perhaps one or two medium size crop fields, and perhaps some livestock using Mr Siika's cows, pigs, chickens, and such. Still not sure what I want done with the rock field behind the commerce district.
I'm not going to put in a DB sanc, ABR already provides that and it would be awkward as hell to step on my own work that way

I don't much see the point of a second player house. Don't people have enough homes already?
I could see some lower class style market stalls in the lower quarter, but not a whole lot of them. Perhaps something logical to handle the farm output?
I also need to hold space here for one middle class home, and one lower class home, or things get ugly fast for patching the two mods in that I know need them.