YDO is a promo single and wilwonky do much to push the album. So the wise choice is to move to the 2nd single.
Just because it is flop, it is not a promo single. It was properly released on radio and iTunes and worldwide.
Promo singles are not released on the radio and are usually part of the iTunes countdown.
I don't think they should give up on "You Da One" just yet. "We Found Love" just won't die, and once it starts to fade, more people will get in to YDO. It could still go Top 10 or Top 5. This is Rihanna, after all!
That being said, the next single should be "Where Have You Been". People are here for dance Rihanna the most, and this would be a huge song. The only downside is that it sounds very similar to "Sexy and I Know It" to me, but maybe that will end up helping the song? If not WHYB, then it should be "Talk That Talk". "Roc Me Out" is the ugly step-sister of "Talk That Talk" (am I the only one that thinks they are a little too similar?), so it would never be a single.
There really isn't much single material on the album.
But then she shouldn't release those, sis. RMO and Wn'L are not good singles, and DOL is pretty weak too.
DOL is most likely to be the most successful balladish song from the album besides WAWL and RMO/WNL are gonna obviously be singles whether we like it or not