I love endless constant inflation, it's the most fair way to distribute the coins without early users advantage. In comparison, Bitcoin distributed 13% of the total supply in the first year.
The downside of the decision is that NgU doesn't work for Grin, yet (inflation tends to zero). So the community is rather small.
CoinSwap is a method of mixing the UTXOs to break the linkability.
Grin is focused on scalability, but also has hidden amounts and no addresses, but UTXOs can be traced by active sniffing node, so CoinSwap should help with this issue.
https://github.com/mimblewimble/mwixnet