Ya I think that what Lubos needs is a panel of users who use his software to contribute ideas and feedback on what features to implement and why and more importantly how to integrate those features in a universal way. The problem at the moment is everyone is requesting different features and options and while many of them are good - they need to be assembled into the program in such a way as to be of universal benefit.
A panel of users who focus on particular modules like inventory or employee payments etc would be beneficial as not all modules are used by all businesses and that includes Lubos - his business would only use some of the modules so other modules he has to try and work out what the business needs to accomplish using any given module and thats hard if its a feature that you don’t actually use yourself.
Best way we could all contribute to Manager would be to have a development team developing a roadmap etc and actively contributing with suggestions of features and how to implement them universally for all businesses. Thats just my thoughts.