We won't know for sure how these improvements will affect FS Traffic until we get access to the Sim Update 15 Beta, which based on Jorg's comment should hopefully be available in the next few weeks.
The changes they are making appear to be focused on improvements to the MSFS Live Traffic (including model matching), so you should definitely see an improvement if you are using FS Traffic with MSFS Live Traffic. With recent Sim Updates, improvements to the MSFS Live Traffic have also trickled down to the MSFS Offline Traffic, which will directly affect FS Traffic.
The changes they have listed do sound promising, and will hopefully fix some of our big bugbears with the current traffic engine. As FS Traffic uses the MSFS traffic engine, it should take advantage of these improvements automatically, but we will evaluate this and likely release an update after Sim Update 15 releases to fine-tune FS Traffic to the improved features.
Mark - Just Flight