CEP cloaks can be removed with the tailoring models, so you can do that currently. We made be adding a patch which would make the cloaks disappear automatically anyhow, but I have not heard full word on this yet.
Bioware cloaks, any that are sold in merchants, or on players etc are most likely all the wrong models for the actual item, this was something I found out later on. We can replace these on players if asked, but please be patient and give us time as well. Just politely ask if a DM is around in the DM channel. I do not want 100 forum posts or PM's, or people coming to IRC nagging to do this. If we are on the server we will try to do this, but sometimes we may be busy or not see everyone who comes in so just nicely ask in the DM channel is all.
Cloaks are supposed to be dyeable as well, but currently that is not working but I am working on getting this fixed as well. Some of these issues will take time and I am trying to take care of as many as possible, but it depeds on several things.
Also with bioware cloaks, I am working for a way to make them customizable through the tailoring dummies or other ways as well, so we may be able to give you more options as well.
Anything else regarding cloaks, there is little I can do about. Yes, I know of virtually every issue that there is with cloaks, yes I know they hide wings, yes I know that they don't look right with every possible armor combination, robes or anything else. Any of these issue's I do not want to hear about anymore. I'm not trying to sound like someone who doesn't care, but a number of the issues that I see people bringing up regarding cloaks are out of anyones hands other than biowares really. And no I am not necessarily refering to anyone here, I've seen the complaints widely amongst avlis on the forums and their IRC channel, I've seen it on a number of NWN boards and on the bioware boards as well.
One more note about the bioware cloaks, if they seem stiff, don't flow, are having clipping issues. Try removing your combat animations override or other overrides. There are issues with these causing the bioware cloaks to seem stiff like cardboard, like the old cloaks that were available through the old bioware crafting. The new bioware cloaks do flow nicely, they fold under when sitting in a chair, and lay out when you sit on the ground, they more while you walk or run, so if you are not seing this, than you have the combat animations override, or another override which affects parts of the movement of bodies which in turn the animations of the cloaks.