I tend to agree on most points. Rexler is going to be great anywhere and doesn't need any upgrades. Vessery seems to have some nice synergy in a bomber list, though.
The Bomber list I flew with some decent, but not great, success was Jonus + 3 Gammas. Vessery takes away two of the Gammas. If you put Vessery in a bomber list, it's not really a bomber list any more.
If you're sticking with Jonus and kitted out Gammas. You can include him, along with 3 scimitars and 17 points of upgrades. You can include him and 3 gammas with seismic bombs and a missile, or Jonus, a Gamma, and a Scimitar with 9 points of upgrades. There are options, especially with cheaper ordnance options coming down the pipe. Whether they work better is certainly debateable, but he at least provides an interesting element to the bomber list that it didn't have before in terms of survivability, consistent hitting power (especially with free target locks), and maneuverability.