Some of this might not be feasible from an actual implementation perspective but since you asked...
1) If the pump doesn't have a drain fitting on it, I would try to locate the valves much closer to the unions or use union ball valves. The way you have it now, every time you take the plumbing apart, the water in the pipes from the valve to the unions will just dump on the floor.
2) That 90 right in front of the intake on the pump looks really close. I'd typically shoot for 5 or 6 pipe diameters' worth of straight pipe in front of an intake. Having angled fittings that close in leaves you open for cavitation, though it depends on how sensitive the pump is - that looks like an Iwaki or Mak 4 maybe, which probably aren't that sensitive anyways (being higher speed pressure-biased pumps by nature).
3) Least important, but it looks like the output from the pump is not perfectly in the vertical plane and there's an extra 45 in there? If you turned the pump 90 degrees you might be able to take advantage of that and eliminate the extra 45s up after the T.
Also, I know this isn't common practice and some may think it's a bit of a hack, but I don't think I am ever again going to hard plumb a pump to PVC. On my 360g I used short rubber couplings immediately before and after each pump to isolate the vibration. It made a HUGE difference in noise. If your system isn't noisy it's probably not worthwhile but if you start it up and it's really noisy, it might be worth a shot.
Your gorgs are all doing well in my system BTW, I am going to be sad to see them go once you're finally up and running!