Well, I've always thought that there was a real mole in the house. At first, I thought it was Mario and that him being picked as the mole was intentional and it was to make people think that he was the mole. But a mole that we knew about. Does that make sense?
But then, I started to think that it was Ife. This was only because in the beginning of the show, she would say little things that would make me think "How could you know that?". I can't remember what she said but she said little things that none of the housemates would know and we did. Maybe she's just smart. Now, more recently, she's been stirring things up a lot and that makes me think that she's a mole.
However, I could be wrong and it could be Mario as he did say that he had a secret that would be revealed on week 6.
There might not even be a mole but I still think that there is.
Anyway, to answer your question, I'm not really sure. I think it would be really interesting if there was a real mole in the house, but I'd also feel a bit annoyed.
It would be good if there was a mole though

As long as they do something interesting.
Hope that all makes sense.