TakaraTomy has posted an interview with their designers who've been working on the Masterpiece Shield Liger. This is a very in depth video which has a lot of very interesting views. It contains CGI renditions of the figure and a wide variety of prototype stages shown in action. Included is also an NJR Shield Liger for a comparison of shape, design, and function. This reveals that the Masterpiece model will indeed be larger than the original version.
Other design aspects are also discussed, such as the semi-realism animal sketches. These were used to rough out the expression of the face and desired shape of the mane. They also go on to say how they compared the original kits to the more realistic motions of these animals to improve the design.
While this video is in Japanese you can get google translated subtitles by clicking the CC button. Subtitles will appear in Japanese. Click the gear icon at the bottom right and select 'Translate' with the language of your country.