As I stated I am not sure where else to put the feed inlet without interfering with the water flow.
As for the outlets, the 400 and up externals as far as I know still use dual outlets. It's more an annoyance that given what you pay IMO shouldn't be there. I mean realistically a 50mm outlet (essentially the same as a 1.5") can handle passively 1400+gph. You don't need to flow anything near that through there. So IMO, a single outlet would work fine, but whatever.
Also, this is quibbling. Very, very seriously, the foam is unreal in this thing. I thought the Deltec made a thick foam...this is well beyond that.