If you have enough head on the inflow pipe, you might consider adding an up-facing nozzle to create a fountain for visual appeal and even more aeration. If the water stays cold enough, trout would be cool. Adding structure in a pond with few plants might help increase forage survival and reproduction. Branch piles can work and might be a source of nutrients in the water as well. Most suggest sinking these, but I just pile them high enough in shallow water that they don't float away. In my ponds, they rot away over time and must be replaced if aquatic vegetation does not get established for cover. Two-inch line is prone to clogging, so you may want to consider building cages with 1" fencing to decrease clogging of the creek-side of the inlet and the pond-side of the outlet. The more surface area on the cages, the better at keeping the flow. Post some pics!