On a related note, I do notice that ramps at the edges of the doors, and if only Adelaide's trams were wider, those ramps colud be longer, allowing for a lower boarding height. The Skoda ForCity, which does have both 100% low floor and pivoting bogies also has those entrance ramps.
One thing I have mentioned elsewhere and I'll just say again now I am reminded. While low floors may be a fundemental part of any on-street tram intended for use as public transport, I feel that easy acess and thus stepless entries are less of an issue with non-PT uses for trams such charters. I think of the fact that buses for PT use are usualy low floor I am taking into account that like busses (but to a lesser extent) passenger trams are not just used for PT, we have organised tram tours (mostly using heritage trams). Also, operators many legacy systems offer charters. I think I have noticed that while low floor busses are taking over in PT use of buses, motor coaches intended for charter services are still high floor, and for they do take wheelchair bound passengers, they bring out wheelchair coaches, which are still high floor but have hoists to lift wheelchairs. I can see why this would not be suitable for PT use, but in the context of charters it sounds fine to me.
Also, level broading to high floor vehicles is possible, and good to conisider in case of interurbans, for example.
EDIT:I do think that Adelaide will consider length rather than width as a way of increasing capacity, in spite of previously having wider trams.