Yes, agree. coz of being in couple not only affects the solo players but even their respective partners.
coz,
1. Roch by herself is strong and knows that she is going good and has lots of fan following and no fear of nomination. But, she was having nomination fear for Keith(may be due to his break for 2weeks), so in order to save themselves she is with cool group now, inspite of knowing Suyyash was wrong.
2. Kish, till now saw her as a strong and bossy women. She also doesn't have nomination fear for herself but she has for Suyyash. Which in turn, turns her to be follower of Keith in this staying together strategy.
But, as couple they surely have 100% advantage over solo players. If not in nominations, atleast they have moral support from their partners, as in BB house they can't believe anyone other than their respective partners an to correct them if anyone goes overboard(as in case of KeRo)