Toys with hollowed out parts aren't necessarily lighter.
e.g. Combiner Wars Hook weighs 176g whereas Generations Springer with all accessories attached weighs 148g. So despite Hook's 'hollowness,' he's actually heavier than non-hollowed Voyagers like Springer.
Dengeki Hobby posted 'pics' of LG-43 but it's all the same renders we saw from Hasbro but with their watermark on it. I'm not even sure if TT released the pics so it could just be them posting the Hasbro pics in order to run a story about it
http://hobby.dengeki.com/news/349470/
I hope not! And it's a bit disconcerting when TTMall is using the same renders as Hasbro rather than live shots which they have traditionally done...