I’d get rid of the track first, but if it must stay on the calendar, here’s my take on it… Basically the goal is to make it a more of a street circuit.
T1 runs wider. T2 utilises the roundabout (that’s currently just after the runoff area there) and is a proper 180 degree hairpin. T3 becomes a hairpin as well, but with a very wide entry.
T4/5, 6 and 7 remain unchanged. There’s no runoff area to the left of the entry into T8, which is a 90 degree right hander. Over the bridge. T9 isn’t as tight as it is now, and uses the current runoff area.
T12/13 (T11/12 after the modifications) is actually a pretty nice chicane. T14 (T13) gets the same treatment as T9, with the cars running right next to the wall on the exit. The next “straight” really becomes a straight, instead of that weird and stupid zig-zag it currently is.
Sector three remains unchanged, with the exception of removing the runoff area from the exit of T20.
Here’s a map: http://dl.dropbox.com/u/1933987/borencia_mod.jpg
Alternatively, I’d just chop half of the circuit of. Make T12 the last corner and modify the first sector.