Please note I do not use the ToE and would be adversely effected by this change.
This is easily changed with the tattoo artist.
I do think the RoBF protection would be awesome since not everyone has a spare minion/can afford a high AC wall set to counter the constantly growing damage of the RoBFs.
I'm not a fan of the GA defense. I am biased, as I use GA. Most ToE's wouldn't have any problems covering the spread as GA returns are based on your own damage, teams that consistently hit for over 3M are rare. The ability to bring GA damage down to 40% means VA would be capable of completely countering the spell and if a Morg or BoTH was thrown on top you'd be draining more HP than the retaliation damage is capable of dishing out.