Isn't there the danger that too many questions are asked at the start and as a result no ideas are put forward and so Playmobil say, "Well, they said they wanted input, we gave them the chance but nothing was put forward." There are great gaps in knowing what they want, and this can be made clear when any proposals are put forward, but at the same time here is an opportunity to put forward what members of the community want. Maybe connectors of the two building systems are not the answer, and this can be explained to Playmobil (good reasons have already been given why this may be the case), and if this is so, then the answer must be something new, maybe drawing on both systems so as to gain the advantages of both and at the same time avoid the disadvantages of both systems, so far as possible.
Here are some thoughts, certainly not complete:
Advantages of Steck:
1. Wall pieces are such a size as to be able to put together a building relatively quickly.
2. Each wall section is well-detailed and incorporates spaces for windows and doors.
3. Finished structures are reasonably rigid.
Disadvantages of Steck:
1. There are a limited number of wall patterns. For example, it would be useful to have a double window wall which could be added to laterally and not just at right angles. Similarly, blank walls would be useful and half length walls.
2. It can be difficult to separate sections when dismantling a building because the tongues fit so tightly.
3. More roof shapes are needed such as a return of the half roof and the introduction of a roof or piece which would allow a right-angled turn, both internal and external, e.g. for a courtyard or L-shape.
Advantages of System-X
1. It is more flexible.
Disadvantages of System-X
1. It is fiddly and time-consuming to put together.
2. Despite (or probably because of) all the connectors, the finished building is often fragile.
3. It is clumsy and too chunky (largely because of the joining method).
There's my two pence worth, although I may add more later. But I think the thing to do now is come up with ideas.