The team working on data files is separate from the team working on the actual product code itself, so the above assertion is incorrect. If supporting Genesys required a lot of developer time, you'd be spot on. However, supporting a new game system like Genesys will be little different from bringing an existing game system like Pathfinder or D&D5e to HLO (aside from the extra time to develop the mechanics instead of just the new UI). So it's definitely a valid request.
Hope this helps!