No, it definitely seems like bell-shaped is the way to go.
The only thing I would change is the blouse. I think the ruffles on the front would look really weird with the cut of the dress. Something in a similar style to that blouse would work, but I would choose something that didn’t have those ruffles. Everything else looks fine, I would just be sure to add nice accessories to bring it all together.
I think it’s possible, but I’m not sure about using the straps because that’s not going to give you much extra fabric to work with. The good thing about that dress is that it’s a solid color so you can easily buy extra solid fabric. Just add it into a shirring panel rather than the sides. It would definitely be more noticeable in the sides where if it was in a shirring panel it would be hidden better. Just be careful that you don’t add too much or you won’t be able to gather the skirt properly again.
There are a lot of accent colors you can throw in. I would personally do either a muted pink or brown. I would use that color for the shoes and other accessories and then maybe the same color as the dress for the legwear. If you wanted a little added interest you could do lace tights or socks instead of tights. The only thing I would specifically advise against would be printed tights unless you were going to do a super impressive hat or something because I think printed tights would weigh the coord down too much and throw it off balance.
I think it could be an option and it would work with or without a blouse. You seem to have made that decision really quickly though so I would just suggest looking around a little more. Keep that one in your mind if you don’t find anything you like better, I just wouldn’t want you to settle for something right away.
It’s definitely bell-shaped. I don’t think it would look very good at all with an A-line petti considering the way the tiers are gathered.
Why would a halter styled JSK be seen as any different than a JSK with two straps? You can still wear it well with a blouse and it still has the overall Lolita concept. It’s fine.
I don’t know of any reviews but I have seen it before and I can honestly say it looks a lot nicer in real life than it does in Bodyline’s stock photo.
Both, especially the JSK, look a bit questionable in Bodyline’s stock photos, but I have seen them worn on someone else and they look much nicer than they do in Bodyline’s photos.