I think Satoshi wanted to but I think that would have been a lot of workload and if just a one-man army, that will probably be too much or there has been some caveats along the way. I think gambling was the easy way to connect people especially when it comes to digital payments, so, probably Satoshi being a pokerhead think through a lot on that as a side quest.
He wanted a lot of things because, in the article, the term timechain is used for the blockchain. The messaging part, though, still works. We can send someone a small UTXO with a message, but it should be big enough to show the message.
I am even surprised that in the early stage, he called fractions of BTC cents instead of satoshi. Thank God he did not keep it that way.
The P2P marketplace idea was resembling the OpenBazaar style marketplace at that time. Mike said this, so maybe it was abandoned, so he was not alone. If he would have been alone and wouldn't get any more help, consultation, or suggestions, then maybe he would have created all that.
But the other developers, whom we don't even know the names of, helped him to give us a sophisticated system.