FDR Agreed, that T handle arrangement isn't conducive to being able to 'damp' your arm using thigh or body contact. If it was LHS flying it as a demonstration on a training sortie with the RHS holding his side of the cyclic normally, the LHS pilot would have his arm up in the air - unless he was holding it 'centre-stick style' - with obvious possibility for PIO.
There could be some impacts there, it is an uncomfortable position to hold as an IP, your arm is not supported at all. There was an STC to add a conventional stick to the R-22, not sure about the 44. Could be worthwhile doing a statistical review of how many bad days occurred with dual controls fitted. IIRC the Concorde one was dual. RHC would have the data to hand, and anything that may improve confidence in franks design is worth the effort.