Famitsu have posted the full interview now. Going off Google Translate, some nice stuff about the features:
- can lower the level of difficulty
- save anywhere (repeatedly practice something) and i think several save slots
- the side of screen gadgets, they say might be hard to see while playing, but they put in such features (that visualise the games' internal information) so that observers can better understand the player's choices. I think they say the gadgets can also appear on a vertical display too (top and bottom?)
- change colour of enemy bullets
- internet rankings, replay data upload
On M2 Shot Triggers -
- seems to mention the 3DS and PC as the only other platforms they could theoretically put them on (based on M2's strength), nothing planned though.
- already working on next wave, several companies have approached (or have been approached maybe)
- they plan to establish it as a series, to flow into the release of original games (Iuchi's Ubusana)