There will be axial thrust due to the helix angle of the gears. This side load is probably handled by thrust bearings and may make it unnecessary to undercut the dogs.
I haven't done much work on gear boxes in general but it looks stronger to me for some reason. Hope they put the correct size C clips in there this time! Massive difference upgrading all the clips and spacers on my 07 model, had a good 5 mm of play in the gears when I upgraded everything got absolutely no play now. Hope that is a good thing!!