Very seriously doubt it's personal, just business. The amount of effort to develop and properly support it doesn't look to be worth it compared to the added benefits given the use cases presented right now. The number of people showing interest really is pretty small compared to the people wanting better VM and docker support.
Features in unraid tend to be worked on based on perceived need, so if more people want a feature, that's where the limited development and support tend to go. Give it time, and maybe iSCSI's time will come.
We lobbied for years to get UPS support, external notifications, dual parity, etc added. Now we have all that plus VM's and dockers.