LMP do monitor punting forums to pick up feedback and you may get a reply here, but as someone who has attended about 30 parties in the last 2 years I'd make the following observations:
1. The photos of the girls on the website come from various sources and are generally what the girl provides, some pro pics, some amateur. There are quite a number of photos on the LMP Twitter that are completely untouched and recent, should give punters more info on what to expect. Of course at a party you are going for the overall experience, not a particular girl. IME it's often the girls with the least appealing photos that turn out to be very hot in the flesh!
2. There's no shame in just watching the action, in fact there are 'perving chairs' for that purpose. Some partygoers are more reticent and need an invitation to join, so I'm sure that was the spirit behind any encouragement you were given. The girls need to be available for other guests, so any 'hogging' of one specific girl will be discouraged, particularly if the party is busy. Partygoers who attend just to be with a certain girl to the exclusion of others may well find they are better suited to 1-2-1 bookings and not parties where everyone shares.