Sorry to disappoint many. The main argument against Kirkland being RJ - the fact that at mid season 5 Lorelei couldn't possibly know about him shaking hands with PJ - is void.
If PJ has included him in the list, on the handshake basis, he IS right. Or do you believe that PJ can't reason about season 5 as the fans do???
Of course, my statement is fit, if the writers of the show do follow the storyline, remember the events as the fan do. Which is not necesarily true, as - everybody knows - there are business rules, money interests which result in pressure, strict timetables and so on.
I hope there will be no cliche', illogical explanation, absurd twists. Would be a shame to ruin a successul, entertaining show.