You're really stuck on that two handed specialization 
It's what I do.
I wish we could have a DA4 where you solve your problems through intelligence, manipulation, strategy, persuasion, teamwork, preparation, stealth, and combat rather than combat alone. Being a one woman murder-machine as your only means to solve problems is boring anyway. I hate RPGs' over reliance on combat.
Ideally what I would want is for all of those to be viable options, but for none of them to be required. In one playthrough I might want to play a character who's, simply speaking, a brute. Someone who has no respect or patience for politicing and guile and who won't lower themselves to it. In another playthrough I might want to play a character who isn't an unstoppable murder machine and actually wouldn't fair particularly well in a fight, but can think and talk their way out of most situations.
One of my issues with the Inquisitor is that they did have to politic and strategize and couldn't just be a thug. I'd like the option to play an eloquent and refined character but I don't want to be forced into it anymore than I want to be forced into playing a mindless brute. It's one of the reasons I want to move away from being the leader of large organizations; I feel that so long as we are that, we're going to have to live up to certain expectations. We're going to have to be inspiring, for whatever that means.
As far as a prosthetic (or what I want which is a simple Captain Hook style attachment of a dagger or something) making losing an arm a temporary inconvenience rather than a real physical and emotional challenge...try saying that to someone in real life with a prosthetic limb.
You're pretty much the only one I've seen asking for the dagger attachment. Everyone else is expecting a lyrium-powered automail cybernetic arm that, if anything, would be an improvement over the flesh and bone, which is a very different thing from modern real life prosthesis.
Of course it might just be that the whole thing reminds me too much of Shadowrun and other cyberpunk settings where people get their limbs lopped off willingly for cyberware replacements. The magetek version of that just strikes me as a juvenile attempt to make the character cool.