I have read only 8 pages of the (currently) 16 on this thread, so someone else may have made these comments ...
I paid for the PC2 before the latest CG was announced. I got it to use for colonisation as I figured that the 400+ extra units per load would make things a little easier/quicker. For example, a large ground-based port - the circular ones with towers in the centre, like Prof. Palin's gaff. 220,000 commodities. 10 carrier loads and 280+ Cutter runs. Actually that's 1120 Cutter runs - FC to supplier, supplier to FC, FC to construction site, CS to FC. About 205,000 commodities are required for an Orbis station. You will lose the will to live, but these ports are really shiny and ultimately worth the effort IMHO, in terms of the satisfaction you get from completing them and the benefits they have to your star system.
This is the first CG I have taken part in after several years of playing ED. I wasn't interested in anything prior to this one. What I found amusing was that the Trailblazer mega ships were the first places to run out of supplies for the CG. When the Trailbazer ships were first deployed, the resupply rate was woefully low, then there was a period when you could pretty much guarantee to get everything you needed for your latest build (even a large port or Orbis). Now the stock levels and resupply rates have plummeted again. Is this as a result of players grabbing everything for the CG? Ironic really, if so. Tralblazers low on stock because of the CG, CG is to supply to Minerva to restock the Trailblazers.
Did FDev lower the restock rates just for the CG? If so, I hope they put them back to reasonable levels after the CG is done, or it will crucify colonisation efforts.
Oh, and the CG will probably not run for 28 days, based on current progress. As I type this, it currently stands at about one third of the way there - 166,794,855 / 500,000,000 - so the CG may run for 9 days or less.