In terms of innovation within the Fsx Platform itself, it's a step forward in technology development, but Tacpack does have it's limitations compared to dedicated combat sims unfortunately. The Flir is listed as an experimental feature only, and VRS won't guarantee it will work on every user's computer setup. In other words, maybe it will work on your computer or maybe it won't. Ummm, no thanks.
Only simobjects can be destroyed or tracked on radar, while regular scenery library objects like bridges and buildings cannot. A lot of Fsx limitations too. Depends on what you expect I guess, but I'd personally rather have uncompromised experinces with DCS Warthog or Falcon/BMS 4.32. I prefer a less 'hobbled' combat simulation.