Re-imagining a set in different colors may not be considered an expert-level MOC, but it definitely qualifies. There are all kinds of things like that on flickr and elsewhere – taking a set from a certain Space faction and redoing it in another faction’s color scheme, etc. It’s all good. As long as it’s Unitron or Blacktron I.
Didn’t mean to diss you; and neither am I. It’s a really good exercise to re-imagine a set, whether it’s color scheme or using new parts that may not have been available when it came out, or whatever.