I thought PM released his own 201 precisely because he wasn't entirely happy with the Lima one and set out to improve on the details. I like my ones very much and would buy more of they were released in the original livery, which is the only one I ever intend modelling. I'm not really sure how much they could be improved upon. The mechanism is good. Cab interior detailing can be done by the modeller. The lighting could be better with the ability to independently control the tail lights and so on but again, with a bit of know how this can be tackled by the modeller.
I'm not rivet counter though, so perhaps there are some glaring anomalies with the model that I have never noticed.