I just have a ******* hole in the boat there with a welded standpipe above it, so maybe I'm not the best guy to ask, but it occurs to me that with the slots facing forward, you run the risk of having small debris like plastic bags get stuck there as the boat moves forward. You might also increase the head pressure to the pump (if you lack a sufficiently high intake loop) that could cause leaking. Aft-facing scoop slots should shed plastic crap and would not funnel water up the hose/pipe when sailing fast.
Feel free to question my logic here. I am going to 4200 a plastic strainer on this fall because it's possible to get a bloody fish stuck up my standpipe, which is even more unpleasant than it sounds!