The volumes will be what you see. They have been established over the last four months. They will now ghost the daddy contracts. WYSIWYG.
Do some research on the MGC as compared to the GC on bid/ask spreads, and you will see that once it is established, it will hold. That thing is what, 9 years old?
Want to have some fun? Start teasing the ladder on the Dec equity micros. Just one contract. Be like a snake with a forked tongue.
The spread you see is totally normal when comparing the micro to the mini, but is does not mean your trading plan is void. Use the mini as a tracker for the micro. You'll get your fills. This is not Class IV milk we're talking here.
One day I saw a momentary 50+ tick discrepancy, and somebody was really happy on their fills. If I placed some out-of-value shorts and longs then they might occasionally get filled. Is this what you are talking about?