I did sail a NW on one of the days I was there and it was good from that direction. I sailed in the same lines as on a SE, but on the opposite tack! It is possible that it could be more Gusty on a NW, but it was OK the day I was there in 20-30 knots. It came through in waves though, around 20 knots for a while and then a prolonged squall around 30 knots etc. Anything with a bit more West in it comes off the ocean so it should be a lot more even, and that was what we experienced. Still had squalls, but the difference was not so much. SW is off the ocean too and colder but it comes in over the land between the ocean and the lake, so one has to stay out further in the lake for the even wind. That was not a problem in the Kev's bay area, launching from the spit. The weed there was very thick though as the SW wind blows the water out into the big lake. A sightly higher water level would probably be better to counter this.
With the weed and water at a good level, it is fine for NW, W and SW around the SE. Too cold for me now though. I am getting soft, and anyway, I prefer the snow this time of the year.