Sounds like plenty of boards and gear to me, Evl. Perhaps even one too many (as Mark touched on). You've done well with one mast though. I think I'm stuck with 3.
I'm 78 kg and effectively have two boards (1) 111 Carve (2) 94 Kode. And with 5 free-ride sails (5, 5.4, 5.8, 6.4 and 7.4) Basically this covers me from 12-30 knots from flat water blasting, bump and jump bay stuff and my dodgy version of wave riding. Once you throw in GPS stuff, things get a little complex. But most freeride and fsw boards with do over 30 knots no probs, so I guess it's a matter of just excepting others on slalom gear will be hitting mid-30s on the same day.
Really, I reckon I could get away with just one FSW board (perhaps the 106 litr version of the Fanatic below) and 3 sails - 5, 6, and 7 mtre cross overs wave / freeride. But everyone is different I guess.
There's definitely positives with your less gear approach. And certainly less confusion about what board and what sail to rig when at waters' edge.