eeehhh...my opinion doesn't really count for much but here's how I see it! XD
So yeah, I draw right to left, and yeah the main reason was just because I read too much manga but ultimately I don't think it's really that big an issue. Sure, For those who are not used to it reading that way can be a huge turnoff and a pain in the ass but I really believe that in a way this jarring feeling could also have a benefit. (of course it isn't good for something to be jarring if you're trying to attract fans and all but I'm just saying what comes to my head without a filter
It's like how our own language limits our perspective on the world and shapes the way that we are able to think. Once we learn a new language we gain new perspective and can think about certain things a bit differently (for example China in Chinese translates to "Middle Kingdom" when your own country's name is basically saying "you are the center of everything" your perspective of your country and all other countries can be a little skewed, by learning to look past some of the limitations of language a person is able to gain a new view on many things.)
In the same way I think that drawing right to left in english can open new doors. I'm not saying it will lead to "amazing" discoveries that would benefit man kind or anything but certainly different techniques and maybe even styles could be developed.
Perhaps it is going against the natural flow of how a person in an English speaking nation should draw, and that by doing so the pages are confusing. This is VERY bad for the reader, but maybe not so much for the artist. If we assume that they realize the pages don't flow well then they will try and fix it and in doing so challenge their mind to work against how it wants to think. This sounds taxing but like learning a language ( I dunno why but since comics are a form of communication I like comparing it to language ._.) after a time you will understand the format, the structure, and how to make it all flow effortlessly. I think that this is a very good challenge for a comic artist to try (even if they don't want to publish a comic that reads that way) because it really makes you think about what makes a comic flow, how do transitions aid or hinder in comprehension? I guess it's a bit like drawing something that you see upside down....it makes you appreciate all the things that usually come naturally to you, and in gaining this understanding you are better able to use these techniques.
By reading in a direction that you are not accustomed to in the language that you are your brain is forced to make new connections and think in a new way. It's an exercise that maybe can be tedious at first but in time it becomes easier and flows better. Yeah, it's definitely not a good thing to make reading your story tedious and by writing right to left you turn away many potential readers, but I'm just saying that maybe there can be even the tiniest value in reading and even writing/drawing something that goes against the general expected flow.
Phew! That was my spiel...sorry if it didn't really make any sense!! >_>;;
and also I'm probably very biased because I do for one believe that my pages are not limited by reading right to left and that they still have some kind of logical flow