Sorry, sorry, I'm late to the party!
There was so much to be done on a great day as yesterday. Rather than writing a giant posts here and there I made a blog post to sum up my thoughts on this whole affair.
http://ryuz4ki57inenglish.wordpress.com/2014/08/13/senran-kaguras-failed-return-on-3ds/
OT : I don't think SK2 bombed. Bombing would be in the 30K range and it's near 50K, so I think "underperforming" applies here. But as I tweeted to Takaki just after the figures went public, it's nonetheless the final and decisive evidence that SK fans want the series on Vita (or at least multi platform so everyone can be happy). Takaki and Marvelous have to face the truth before their eyes and start giving information about Estival Versus instead of covering up their shady deals on SK2. Costumers should come first in management decisions.
Really sad for Lost Dimension...