For SEMUX, it may be a big problem to make a simple and smooth synchronization of the wallet. If it is not solved in time, it may have a great impact to listed on exchanges and the future development.
light wallet is not the priority and not so difficult to achieve.
I think dev team is focusing on semux core issue. better for long term development.
dont worry ,devs are working hard ,if there is no problem i think is the biggest problem. develop a project step by step.