I would say it is okay.
Bearing in mind that Small Universe (Microcosmic Orbit) is a meditation that many many qigong masters still do on a regular basis. It IS important. But if for some reason it is a chore for you to get around to doing I would skip it.
For over a year I would exclusively do active exercises only. Now I incorporate SU regularly. As long as you are getting the qi moving it should be okay.
