Rhubarb and Strawberry Crumble Cake

I've rated this as "very good", as this was a nice cake, but it didn't blow me away. I'm not sure if I will make this one again since I have other rhubarb recipes that I like a bit better. I reduced the sugar in both the cake and the crumble and it was still more than sweet enough for me. I made a half recipe and baked about 40 minutes at 375 convection. I also covered with foil for the last bit of baking. I found the crumble topping to be quite hard so maybe I overbaked a little.