Once the mastery skins are unlocked, there really is little to no point in grinding on to max out elite experience. Personally, I am a huge fan of the mastery skins, the aesthetics are awesome. However, having reached level 10 for Gabriel and a few others, it's apparent that the "Hero's Mark" reward is simply underwhelming. In fact, I despise the additional visual clutter they add. The existing rings around elites serve as sufficient indication, and honestly I do not feel any more "prestigious" by having some extra golden ring around my already visually plentiful Terminators.
I ask that you reconsider the elite rewards for reaching max level, but at the very least provide us with an option to enable or disable viewing the extra rings around our elites, the same way we can swap between different elite skins. Just like mastery skins, this is a matter of preference and those who do not fancy the eyesore like myself should be able to adjust it so.