Microsoft Skype for Business Server 2015
Hello LH, As far as the reverse proxy deployment goes, those objects are still tied together. The reason being is it is presenting the reverse proxy section as a whole. The objects created for reverse proxy are the same whether director role is enabled or not, the only difference is if director role is enabled then a pool is created based on the director pool member IP field in the iApp and the iRule attached to the 80/443(on external) VIP passes the majority of the traffic through to the director pool/big ip instead of the front end. Now the exception is when using split LTM's(as you are) where different sets of objects are created in different places. But in either case the only "dummy" fields would be including a front end fake pool member ip potentially, and depending on single/split some unnecessary LTM objects. But for reverse proxy this is not on our roadmap to break out.
In the case of the reverse proxy the best practice is to terminate SSL, this is for various reasons. So the iApp does require a valid cert and for ssl ports will use that cert selected.
For the 4443 objects not getting created, please download a slightly newer version of the rc posted here and retry, thanks! I was not able to reproduce the error you got about illegal sharing so if it still occurs with the new template then could you provide more details on the errors received?