Split-screen should be available for the PC version. There's no reason why they couldn't implement it, BUT the bigger issue is that there's apparently no online co-op support for any version of the game - which puts the PC version in a worse position than the console versions because it means there's absolutely no co-op available for the PC version, and Duels mode is also absent.
PC players essentially will have to pay the same price as the console versions for a version that features less content and features. This is criminal. What adds insult to injury is the fact the PC platform potentially offers far superior hardware than the console versions.
This is unacceptable. Online co-op support is needed for all versions (even the last Battlefront featured it and it was fantastic; I personally hate sharing a screen), and the PC version should have split-screen support as well as Duels mode.