The new initiative to draft Chareidim into the army. Should Yeshiva boys draft into the all-Charedi “Chashmonaim” Brigade?

What are the arguments that there’s an obligation to serve in the IDF?
What are the arguments that there’s no obligation for someone learning Torah to join the army?
What if the person is not learning, but is working or doing something else?
What are the main challenges of a Chareidi boy/man joining the IDF?
Can those issues be fully addressed? What initiatives are currently under way to address the concerns?