It's unacceptable because you are considering FoB to be in the same league as an LLTS. The crit increase is for 15 seconds out of 2 and a half minutes. This is about every 6th monster or so if you are lucky. This is about 4 attempts with a Support Beam if you are lucky on every sixth MoB. Melee users get parried constantly which Ranged users don't have to deal with. Constantly Parried. A Qlvl200 FoB CAN'T be equipped by even those who have the cheapest FastAttack. Melee users don't have the same amount of special attacks as Ranged users and can't get the 10K shots. If you want to use most of the damaging melee weapons you often have to go Full Agro. FoB at qlvl 200 puts you another 25% PAST Full Agro. You get critted on YOURSELF by the monster CONSTANTLY when running FoB.
You CAN'T put FoB into the equation unless you either increase the Crit duration or reduce the time that FastAttack is locked.
FoB works ok for attacking with Martial Arts because fists are so fast you can stay at full defense. BUT, it is still only 15 seconds out of every 2 and a half minutes. Once again, I repeat: that is only about every sixth mob if you are lucky.
The other point is that in none of this have you considered the effect that the init 'fix' that is coming will have on this whole picture. You are considering this huge Nerf when you already have a Nerf coming. The interaction between the init 'fix' and this Nerf should not have to be evaluated simultaneously. The appropriate thing to do is to wait and see how -800 to inits affects those with 15% scopes once it starts affecting Recharge time and THEN decide what the appropriate measures to take regarding these legacy items is. That's the professional way to go about system design. Get the init change on test ASAP and ask the professionals their opinion. Don't forget Xtreme, the ex-MP professional who uses Martial Arts on his high level MP.
You are also throwing around MoP like it's candy. Why not pop into people's mission and take a look at how many people actually have MoP or the Crat speech active at any given snapshot in time. Just because it's in the game doesn't mean we all have it running in our NCU's at all times. If I'm lucky, I got MoP running a bit less than 1% of my AO career. That's when I'm in high level teams. And one thing high level characters don't need is a more difficult time leveling. The boredom from trying to level is making them all quit.
Cap the crit chance and special cases (like Agent nanos) to break it. You will keep your customers happy. The one thing you continuously seem to do is alienate the customers who are still sticking with you. Having a cap is an equalizer. It affects everyone while still not messing with the way people enjoy the game. None of the 'problems' we are all griping about in this thread would come into play. You would achieve what you want: an absolute maximum amount of crits that can be achieved. You also provide a benefit to those who have the 15% scopes in that they now have options with IP's and NCU's as they have an 8% advantage they don't have to work towards having probably already hit their cap. LLTS owners would be happy as well. Saying this is more 'difficult' should not be an option for you. You are supposed to to the RIGHT thing.