Yes, I think the Masood/Yusef relationship is very complex and is an excellent storyline, probably one of the best Eastenders has done insofar as exploring the interaction between different characters with the added complications of Tam/Afia and Syed giving further dimensions to it.
Plus, of course, it's not just Bhatti, but all of them are excellent actors which helps make the whole thing more believable. As far as characterisation and acting goes, this whole storyline is one of the best (if not THE best) Eastenders has ever attempted and so far it is coming off.